*Added Convoke for the human only. (AI will always pay full cost currently.)

*Converted Sprout Swarm to script and completed it.
*Added
	Autochthon Wurm
	Conclave Equenaut
	Conclave Phalanx
	Conclave's Blessing
	Devouring Light
	Gather Courage
	Guardian of Vitu-Ghazi
	Hour of Reckoning
	Kavu Primarch
	Overwhelm
	Root-Kin Ally
	Scatter the Seeds
	Siege Wurm
	Sundering Vitae

.gitattributes

@@ -485,6 +485,7 @@ res/cardsfolder/a/aurora_eidolon.txt svneol=native#text/plain
 res/cardsfolder/a/aurora_griffin.txt svneol=native#text/plain
 res/cardsfolder/a/auspicious_ancestor.txt svneol=native#text/plain
 res/cardsfolder/a/austere_command.txt svneol=native#text/plain
+res/cardsfolder/a/autochthon_wurm.txt -text
 res/cardsfolder/a/avacynian_priest.txt -text
 res/cardsfolder/a/avacyns_pilgrim.txt -text
 res/cardsfolder/a/avalanche.txt svneol=native#text/plain
@@ -1501,6 +1502,9 @@ res/cardsfolder/c/compulsion.txt svneol=native#text/plain
 res/cardsfolder/c/compulsive_research.txt svneol=native#text/plain
 res/cardsfolder/c/concentrate.txt svneol=native#text/plain
 res/cardsfolder/c/conch_horn.txt svneol=native#text/plain
+res/cardsfolder/c/conclave_equenaut.txt -text
+res/cardsfolder/c/conclave_phalanx.txt -text
+res/cardsfolder/c/conclaves_blessing.txt -text
 res/cardsfolder/c/concordant_crossroads.txt svneol=native#text/plain
 res/cardsfolder/c/concussive_bolt.txt svneol=native#text/plain
 res/cardsfolder/c/condemn.txt svneol=native#text/plain
@@ -2007,6 +2011,7 @@ res/cardsfolder/d/devoted_hero.txt svneol=native#text/plain
 res/cardsfolder/d/devoted_retainer.txt svneol=native#text/plain
 res/cardsfolder/d/devour_in_shadow.txt svneol=native#text/plain
 res/cardsfolder/d/devouring_deep.txt svneol=native#text/plain
+res/cardsfolder/d/devouring_light.txt -text
 res/cardsfolder/d/devouring_rage.txt -text
 res/cardsfolder/d/devouring_strossus.txt -text
 res/cardsfolder/d/devouring_swarm.txt svneol=native#text/plain
@@ -3098,6 +3103,7 @@ res/cardsfolder/g/gate_hound.txt svneol=native#text/plain
 res/cardsfolder/g/gate_to_phyrexia.txt svneol=native#text/plain
 res/cardsfolder/g/gatekeeper_of_malakir.txt svneol=native#text/plain
 res/cardsfolder/g/gathan_raiders.txt svneol=native#text/plain
+res/cardsfolder/g/gather_courage.txt -text
 res/cardsfolder/g/gatherer_of_graces.txt svneol=native#text/plain
 res/cardsfolder/g/gatstaf_shepherd_gatstaf_howler.txt -text
 res/cardsfolder/g/gauntlet_of_might.txt svneol=native#text/plain
@@ -3558,6 +3564,7 @@ res/cardsfolder/g/guardian_idol.txt svneol=native#text/plain
 res/cardsfolder/g/guardian_of_cloverdell.txt svneol=native#text/plain
 res/cardsfolder/g/guardian_of_solitude.txt svneol=native#text/plain
 res/cardsfolder/g/guardian_of_the_guildpact.txt svneol=native#text/plain
+res/cardsfolder/g/guardian_of_vitu_ghazi.txt -text
 res/cardsfolder/g/guardian_seraph.txt svneol=native#text/plain
 res/cardsfolder/g/guardian_zendikon.txt svneol=native#text/plain
 res/cardsfolder/g/guardians_magemark.txt svneol=native#text/plain
@@ -3848,6 +3855,7 @@ res/cardsfolder/h/horseshoe_crab.txt svneol=native#text/plain
 res/cardsfolder/h/hostile_realm.txt svneol=native#text/plain
 res/cardsfolder/h/hot_springs.txt svneol=native#text/plain
 res/cardsfolder/h/hotheaded_giant.txt -text
+res/cardsfolder/h/hour_of_reckoning.txt -text
 res/cardsfolder/h/hoverguard_observer.txt svneol=native#text/plain
 res/cardsfolder/h/hoverguard_sweepers.txt svneol=native#text/plain
 res/cardsfolder/h/hovermyr.txt svneol=native#text/plain
@@ -4295,6 +4303,7 @@ res/cardsfolder/k/kavu_lair.txt svneol=native#text/plain
 res/cardsfolder/k/kavu_mauler.txt svneol=native#text/plain
 res/cardsfolder/k/kavu_monarch.txt svneol=native#text/plain
 res/cardsfolder/k/kavu_predator.txt svneol=native#text/plain
+res/cardsfolder/k/kavu_primarch.txt -text
 res/cardsfolder/k/kavu_recluse.txt svneol=native#text/plain
 res/cardsfolder/k/kavu_runner.txt svneol=native#text/plain
 res/cardsfolder/k/kavu_scout.txt svneol=native#text/plain
@@ -5804,6 +5813,7 @@ res/cardsfolder/o/overrun.txt svneol=native#text/plain
 res/cardsfolder/o/oversold_cemetery.txt svneol=native#text/plain
 res/cardsfolder/o/oversoul_of_dusk.txt svneol=native#text/plain
 res/cardsfolder/o/overtaker.txt svneol=native#text/plain
+res/cardsfolder/o/overwhelm.txt -text
 res/cardsfolder/o/overwhelming_forces.txt svneol=native#text/plain
 res/cardsfolder/o/overwhelming_intellect.txt svneol=native#text/plain
 res/cardsfolder/o/overwhelming_stampede.txt svneol=native#text/plain
@@ -6738,6 +6748,7 @@ res/cardsfolder/r/roofstalker_wight.txt svneol=native#text/plain
 res/cardsfolder/r/root_cage.txt svneol=native#text/plain
 res/cardsfolder/r/root_elemental.txt svneol=native#text/plain
 res/cardsfolder/r/root_greevil.txt -text
+res/cardsfolder/r/root_kin_ally.txt -text
 res/cardsfolder/r/root_maze.txt svneol=native#text/plain
 res/cardsfolder/r/root_sliver.txt svneol=native#text/plain
 res/cardsfolder/r/root_spider.txt svneol=native#text/plain
@@ -6952,6 +6963,7 @@ res/cardsfolder/s/scarwood_goblins.txt svneol=native#text/plain
 res/cardsfolder/s/scarwood_hag.txt svneol=native#text/plain
 res/cardsfolder/s/scarwood_treefolk.txt svneol=native#text/plain
 res/cardsfolder/s/scathe_zombies.txt svneol=native#text/plain
+res/cardsfolder/s/scatter_the_seeds.txt -text
 res/cardsfolder/s/scattershot.txt svneol=native#text/plain
 res/cardsfolder/s/scattershot_archer.txt svneol=native#text/plain
 res/cardsfolder/s/scavenged_weaponry.txt svneol=native#text/plain
@@ -7298,6 +7310,7 @@ res/cardsfolder/s/sidewinder_sliver.txt svneol=native#text/plain
 res/cardsfolder/s/siege_gang_commander.txt svneol=native#text/plain
 res/cardsfolder/s/siege_mastodon.txt svneol=native#text/plain
 res/cardsfolder/s/siege_of_towers.txt svneol=native#text/plain
+res/cardsfolder/s/siege_wurm.txt -text
 res/cardsfolder/s/sift.txt svneol=native#text/plain
 res/cardsfolder/s/sift_through_sands.txt -text
 res/cardsfolder/s/sighted_caste_sorcerer.txt svneol=native#text/plain
@@ -8063,6 +8076,7 @@ res/cardsfolder/s/sunblast_angel.txt svneol=native#text/plain
 res/cardsfolder/s/suncrusher.txt svneol=native#text/plain
 res/cardsfolder/s/sunder.txt svneol=native#text/plain
 res/cardsfolder/s/sunder_from_within.txt svneol=native#text/plain
+res/cardsfolder/s/sundering_vitae.txt -text
 res/cardsfolder/s/sunfire_balm.txt svneol=native#text/plain
 res/cardsfolder/s/sunflare_shaman.txt svneol=native#text/plain
 res/cardsfolder/s/sunglasses_of_urza.txt svneol=native#text/plain

res/cardsfolder/a/autochthon_wurm.txt

@@ -0,0 +1,12 @@
+Name:Autochthon Wurm
+ManaCost:10 G G G W W
+Types:Creature Wurm
+Text:no text
+PT:9/14
+K:Trample
+K:Convoke
+SVar:Rarity:Rare
+SVar:Picture:http://www.wizards.com/global/images/magic/general/autochthon_wurm.jpg
+SetInfo:RAV|Rare|http://magiccards.info/scans/en/rav/191.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nTrample
+End

res/cardsfolder/c/conclave_equenaut.txt

@@ -0,0 +1,12 @@
+Name:Conclave Equenaut
+ManaCost:4 W W
+Types:Creature Human Soldier
+Text:no text
+PT:3/3
+K:Flying
+K:Convoke
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/conclave_equenaut.jpg
+SetInfo:RAV|Common|http://magiccards.info/scans/en/rav/9.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nFlying
+End

res/cardsfolder/c/conclave_phalanx.txt

@@ -0,0 +1,14 @@
+Name:Conclave Phalanx
+ManaCost:4 W
+Types:Creature Human Soldier
+Text:no text
+PT:2/4
+K:Convoke
+T:Mode$ ChangesZone | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigGainLife | TriggerDescription$ When CARDNAME enters the battlefield, you gain 1 life for each creature you control.
+SVar:TrigGainLife:AB$GainLife | Cost$ 0 | Defined$ You | LifeAmount$ X
+SVar:X:Count$Valid Creature.YouCtrl
+SVar:Rarity:Uncommon
+SVar:Picture:http://www.wizards.com/global/images/magic/general/conclave_phalanx.jpg
+SetInfo:RAV|Uncommon|http://magiccards.info/scans/en/rav/10.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nWhen Conclave Phalanx enters the battlefield, you gain 1 life for each creature you control.
+End

res/cardsfolder/c/conclaves_blessing.txt

@@ -0,0 +1,14 @@
+Name:Conclave's Blessing
+ManaCost:3 W
+Types:Enchantment Aura
+Text:no text
+K:Convoke
+A:SP$Attach | Cost$ 3 W | ValidTgts$ Creature | AILogic$ Pump
+S:Mode$ Continuous | Affected$ Card.EnchantedBy | AddToughness$ X | Description$ Enchanted creature gets +0/+2 for each other creature you control.
+SVar:X:SVar$OtherCreats/Twice
+SVar:OtherCreats:Count$Valid Creature.YouCtrl/Minus.1
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/conclaves_blessing.jpg
+SetInfo:RAV|Common|http://magiccards.info/scans/en/rav/11.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nEnchant creature\nEnchanted creature gets +0/+2 for each other creature you control.
+End

res/cardsfolder/d/devouring_light.txt

@@ -0,0 +1,11 @@
+Name:Devouring Light
+ManaCost:1 W W
+Types:Instant
+Text:no text
+K:Convoke
+A:SP$ ChangeZone | Cost$ 1 W W | ValidTgts$ Creature.attacking,Creature.blocking | TgtPrompt$ Select target attacking or blocking creature. | Origin$ Battlefield | Destination$ Exile | SpellDescription$ Exile target attacking or blocking creature.
+SVar:Rarity:Uncommon
+SVar:Picture:http://www.wizards.com/global/images/magic/general/devouring_light.jpg
+SetInfo:RAV|Uncommon|http://magiccards.info/scans/en/rav/13.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nExile target attacking or blocking creature.
+End

res/cardsfolder/g/gather_courage.txt

@@ -0,0 +1,11 @@
+Name:Gather Courage
+ManaCost:G
+Types:Instant
+Text:no text
+K:Convoke
+A:SP$Pump | Cost$ G | Tgt$ TgtC | NumAtt$ 2 | NumDef$ 2 | SpellDescription$ Target creature gets +2/+2 until end of turn.
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/gather_courage.jpg
+SetInfo:RAV|Common|http://magiccards.info/scans/en/rav/165.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nTarget creature gets +2/+2 until end of turn.
+End

res/cardsfolder/g/guardian_of_vitu_ghazi.txt

@@ -0,0 +1,12 @@
+Name:Guardian of Vitu-Ghazi
+ManaCost:6 G W
+Types:Creature Elemental
+Text:no text
+PT:4/7
+K:Convoke
+K:Vigilance
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/guardian_of_vitu_ghazi.jpg
+SetInfo:RAV|Common|http://magiccards.info/scans/en/rav/212.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nVigilance
+End

res/cardsfolder/h/hour_of_reckoning.txt

@@ -0,0 +1,12 @@
+Name:Hour of Reckoning
+ManaCost:4 W W W
+Types:Sorcery
+Text:no text
+K:Convoke
+A:SP$DestroyAll | Cost$ 4 W W W | ValidCards$ Creature.nonToken | SpellDescription$ Destroy all nonToken creatures.
+SVar:Rarity:Rare
+SVar:Picture:http://www.wizards.com/global/images/magic/general/hour_of_reckoning.jpg
+SetInfo:RAV|Rare|http://magiccards.info/scans/en/rav/21.jpg
+SetInfo:COM|Rare|http://magiccards.info/scans/en/cmd/15.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nDestroy all nontoken creatures.
+End

res/cardsfolder/k/kavu_primarch.txt

@@ -0,0 +1,13 @@
+Name:Kavu Primarch
+ManaCost:3 G
+Types:Creature Kavu
+Text:no text
+PT:3/3
+K:Convoke
+K:Kicker:4
+K:etbCounter:P1P1:4:isValid Card.kicked:If CARDNAME was kicked, it enters the battlefield with four +1/+1 counters on it.
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/kavu_primarch.jpg
+SetInfo:FUT|Common|http://magiccards.info/scans/en/fut/128.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its total cost by {1} or by one mana of that creature's color.)\nKicker {4} (You may pay an additional {4} as you cast this spell.)\nIf Kavu Primarch was kicked, it enters the battlefield with four +1/+1 counters on it.
+End

res/cardsfolder/o/overwhelm.txt

@@ -0,0 +1,11 @@
+Name:Overwhelm
+ManaCost:5 G G
+Types:Sorcery
+Text:no text
+K:Convoke
+A:SP$PumpAll | Cost$ 5 G G | ValidCards$ Creature.YouCtrl | NumAtt$ 3 | NumDef$ 3 | SpellDescription$ Creatures you control get +3/+3 until end of turn.
+SVar:Rarity:Uncommon
+SVar:Picture:http://www.wizards.com/global/images/magic/general/overwhelm.jpg
+SetInfo:RAV|Uncommon|http://magiccards.info/scans/en/rav/175.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nCreatures you control get +3/+3 until end of turn.
+End

res/cardsfolder/r/root_kin_ally.txt

@@ -0,0 +1,12 @@
+Name:Root-Kin Ally
+ManaCost:4 G G
+Types:Creature Elemental Warrior
+Text:no text
+PT:3/3
+K:Convoke
+A:AB$Pump | Cost$ tapXType<2/Creature> | Defined$ Self | NumAtt$ 2 | NumDef$ 2 | SpellDescription$ CARDNAME gets +2/+2 until end of turn.
+SVar:Rarity:Uncommon
+SVar:Picture:http://www.wizards.com/global/images/magic/general/root_kin_ally.jpg
+SetInfo:RAV|Uncommon|http://magiccards.info/scans/en/rav/180.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nTap two untapped creatures you control: Root-Kin Ally gets +2/+2 until end of turn.
+End

res/cardsfolder/s/scatter_the_seeds.txt

@@ -0,0 +1,11 @@
+Name:Scatter the Seeds
+ManaCost:3 G G
+Types:Instant
+Text:no text
+K:Convoke
+A:SP$ Token | Cost$ G | TokenAmount$ 3 | TokenName$ Saproling | TokenTypes$ Creature,Saproling | TokenOwner$ You | TokenColors$ Green | TokenPower$ 1 | TokenToughness$ 1 | SpellDescription$ Put three 1/1 green Saproling creature tokens onto the battlefield.
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/scatter_the_seeds.jpg
+SetInfo:RAV|Common|http://magiccards.info/scans/en/rav/181.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nPut three 1/1 green Saproling creature tokens onto the battlefield.
+End

res/cardsfolder/s/siege_wurm.txt

@@ -0,0 +1,11 @@
+Name:Siege Wurm
+ManaCost:5 G G
+Types:Creature Wurm
+Text:no text
+PT:5/5
+K:Convoke
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/siege_wurm.jpg
+SetInfo:RAV|Common|http://magiccards.info/scans/en/rav/183.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nTrample
+End

res/cardsfolder/s/sprout_swarm.txt

@@ -1,7 +1,10 @@
 Name:Sprout Swarm
 ManaCost:1 G
 Types:Instant
-Text:(NOTE: "Convoke" is not implemented.)
+Text:no text
+K:Convoke
+A:SP$ Token | Cost$ 1 G | TokenAmount$ 1 | TokenName$ Saproling | TokenTypes$ Creature,Saproling | TokenOwner$ You | TokenColors$ Green | TokenPower$ 1 | TokenToughness$ 1 | SpellDescription$ Put a 1/1 green Saproling creature token onto the battlefield.
+SVar:Buyback:3
 SVar:RemRandomDeck:True
 SVar:Rarity:Common
 SVar:Picture:http://www.wizards.com/global/images/magic/general/sprout_swarm.jpg

res/cardsfolder/s/sundering_vitae.txt

@@ -0,0 +1,11 @@
+Name:Sundering Vitae
+ManaCost:2 G
+Types:Instant
+Text:no text
+K:Convoke
+A:SP$ Destroy | Cost$ 2 G | ValidTgts$ Artifact,Enchantment | TgtPrompt$ Select target artifact or enchantment | SpellDescription$ Destroy target artifact or enchantment.
+SVar:Rarity:Common
+SVar:Picture:http://www.wizards.com/global/images/magic/general/sundering_vitae.jpg
+SetInfo:RAV|Common|http://magiccards.info/scans/en/rav/185.jpg
+Oracle:Convoke (Each creature you tap while casting this spell reduces its cost by {1} or by one mana of that creature's color.)\nDestroy target artifact or enchantment.
+End

src/main/java/forge/CardUtil.java

@@ -16,6 +16,7 @@ import org.apache.commons.lang3.StringUtils;
 import forge.card.mana.ManaCost;
 import forge.card.spellability.SpellAbility;
 import forge.card.spellability.SpellAbilityList;
+import forge.gui.input.InputPayManaCostUtil;
 import forge.item.CardPrinted;
 import forge.properties.ForgeProps;
 import forge.properties.NewConstants;
@@ -929,4 +930,30 @@ public final class CardUtil {
         return res;
     }
     
+    public static ArrayList<String> getConvokableColors(final Card cardToConvoke, ManaCost cost)
+    {
+        ArrayList<String> usableColors = new ArrayList<String>();
+        
+        if(cost.getColorlessManaAmount() > 0)
+        {
+            usableColors.add("colorless");
+        }
+        for(CardColor col : cardToConvoke.getColor())
+        {
+            for(String strCol : col.toStringArray())
+            {
+                if(strCol.equals("colorless"))
+                {
+                    continue;
+                }
+                if(cost.toString().contains(InputPayManaCostUtil.getShortColorString(strCol)))
+                {
+                    usableColors.add(strCol.toString());
+                }
+            }
+        }
+        
+        return usableColors;
+    }
+
 } // end class CardUtil

src/main/java/forge/GameAction.java

@@ -36,6 +36,7 @@ import forge.gui.GuiUtils;
 import forge.gui.input.InputMulligan;
 import forge.gui.input.InputPayManaCost;
 import forge.gui.input.InputPayManaCostAbility;
+import forge.gui.input.InputPayManaCostUtil;
 import forge.item.CardPrinted;
 import forge.properties.ForgeProps;
 import forge.properties.NewConstants.Lang.GameAction.GameActionText;
@@ -2032,7 +2033,103 @@ public class GameAction {
 
                         this.exile(chosen);
                     }
+                    manaCost = new ManaCost(originalCost.toString());
+                    manaCost.decreaseColorlessMana(numToExile);
                 }
+            } else if (spell.getSourceCard().hasKeyword("Convoke")) {
+                CardList untappedCreats = spell.getActivatingPlayer().getCardsIn(Zone.Battlefield).getType("Creature");
+                untappedCreats = untappedCreats.filter(new CardListFilter() {
+                   public boolean addCard(Card c) {
+                       return !c.isTapped();
+                   }
+                });
+                
+                if(untappedCreats.size() != 0)
+                {  
+                    ArrayList<Object> choices = new ArrayList<Object>();
+                    for(Card c : untappedCreats) {
+                        choices.add(c);
+                    }
+                    choices.add("DONE");
+                    ArrayList<String> usableColors = new ArrayList<String>();
+                    ManaCost newCost = new ManaCost(originalCost.toString());
+                    Object tapForConvoke = null;
+                    if(sa.getActivatingPlayer().isHuman())
+                    {
+                        tapForConvoke = GuiUtils.getChoiceOptional("Tap for Convoke? " + newCost.toString(), choices.toArray());
+                    }
+                    else {
+                        //TODO: AI to choose a creature to tap would go here
+                        //Probably along with deciding how many creatures to tap
+                    }
+                    while(tapForConvoke != null && (tapForConvoke instanceof Card) && untappedCreats.size() != 0) {
+                        Card workingCard = (Card) tapForConvoke;
+                        usableColors = CardUtil.getConvokableColors(workingCard, newCost);
+                        
+                        if(usableColors.size() != 0)
+                        {
+                            String chosenColor = usableColors.get(0);
+                            if(usableColors.size() > 1)
+                            {
+                                if(sa.getActivatingPlayer().isHuman())
+                                {
+                                    chosenColor = (String)GuiUtils.getChoice("Convoke for which color?", usableColors.toArray());
+                                }
+                                else
+                                {
+                                    //TODO: AI for choosing which color to convoke goes here.
+                                }
+                            }
+                            
+                            if(chosenColor.equals("colorless"))
+                            {
+                                newCost.decreaseColorlessMana(1);
+                            }
+                            else
+                            {
+                                String newCostStr = newCost.toString();
+                                newCostStr = newCostStr.replaceFirst(InputPayManaCostUtil.getShortColorString(chosenColor), "");
+                                newCost = new ManaCost(newCostStr.trim());
+                            }
+                            
+                            sa.addTappedForConvoke(workingCard);
+                            choices.remove(workingCard);
+                            untappedCreats.remove(workingCard);
+                            if(choices.size() < 2 || newCost.getConvertedManaCost() == 0) {
+                                break;
+                            }
+                        }
+                        else
+                        {
+                            untappedCreats.remove(workingCard);
+                        }
+
+                        if(sa.getActivatingPlayer().isHuman())
+                        {
+                            tapForConvoke = GuiUtils.getChoiceOptional("Tap for Convoke? " + newCost.toString(), choices.toArray());
+                        }
+                        else {
+                            //TODO: AI to choose a creature to tap would go here
+                        }
+                    }
+                    
+                    //will only be null if user cancelled.
+                    if(tapForConvoke != null) {
+                        //Convoked creats are tapped here with triggers suppressed,
+                        //Then again when payment is done(In InputPayManaCost.done()) with suppression cleared.
+                        //This is to make sure that triggers go off at the right time
+                        //AND that you can't use mana tapabilities of convoked creatures
+                        //to pay the convoked cost.
+                        AllZone.getTriggerHandler().suppressMode("Taps");
+                        for(Card c : sa.getTappedForConvoke()) {
+                            c.tap();
+                        }
+                        AllZone.getTriggerHandler().clearSuppression("Taps");
+                        
+                        manaCost = newCost;
+                    }
+                }
+                
             }
         } // isSpell
 
@@ -2535,7 +2632,7 @@ public class GameAction {
                     AllZone.getInputControl().setInput(sa.getAfterPayMana());
                 }
             } else if (sa.getBeforePayMana() == null) {
-                AllZone.getInputControl().setInput(new InputPayManaCost(sa));
+                AllZone.getInputControl().setInput(new InputPayManaCost(sa,manaCost));
             } else {
                 AllZone.getInputControl().setInput(sa.getBeforePayMana());
             }

src/main/java/forge/card/cardfactory/CardFactoryInstants.java

@@ -52,53 +52,7 @@ public class CardFactoryInstants {
     public static Card getCard(final Card card, final String cardName) {
 
         // *************** START *********** START **************************
-        if (cardName.equals("Sprout Swarm")) {
-            final SpellAbility spellOne = new Spell(card) {
-                private static final long serialVersionUID = -609007714604161377L;
-
-                @Override
-                public boolean canPlayAI() {
-                    return false;
-                }
-
-                @Override
-                public void resolve() {
-                    CardFactoryUtil.makeTokenSaproling(card.getController());
-                }
-            }; // SpellAbility
-
-            final SpellAbility spellTwo = new Spell(card) {
-                private static final long serialVersionUID = -1387385820860395676L;
-
-                @Override
-                public void resolve() {
-                    CardFactoryUtil.makeTokenSaproling(card.getController());
-                    // return card to the hand
-                    final PlayerZone hand = card.getController().getZone(Constant.Zone.Hand);
-                    AllZone.getGameAction().moveTo(hand, card);
-                }
-            }; // SpellAbility
-
-            spellOne.setManaCost("1 G");
-            spellTwo.setManaCost("4 G");
-            spellTwo.setAdditionalManaCost("3");
-
-            spellOne.setDescription("Put a 1/1 green Saproling token onto the battlefield.");
-            spellTwo.setDescription("Buyback 3 (You may pay an additional 3 as you cast this spell. "
-                    + "If you do, put this card into your hand as it resolves.)");
-
-            spellOne.setStackDescription("Sprout Swarm - Put a 1/1 green Saproling token onto the battlefield");
-            spellTwo.setStackDescription("Sprout Swarm - Buyback, Put a 1/1 green "
-                    + "Saproling token onto the battlefield");
-
-            spellTwo.setIsBuyBackAbility(true);
-
-            card.addSpellAbility(spellOne);
-            card.addSpellAbility(spellTwo);
-        } // *************** END ************ END **************************
-
-        // *************** START *********** START **************************
-        else if (cardName.equals("Fact or Fiction")) {
+        if (cardName.equals("Fact or Fiction")) {
             final SpellAbility spell = new Spell(card) {
                 private static final long serialVersionUID = 1481112451519L;
 

src/main/java/forge/card/cost/CostMana.java

@@ -388,10 +388,37 @@ public class CostMana extends CostPart {
                     CostUtil.setInput(CostMana.inputPayXMana(sa, payment, costMana, costMana.getXMana()));
                 }
                 
+                //If this is a spell with convoke, re-tap all creatures used for it.
+                //This is done to make sure Taps triggers go off at the right time
+                //(i.e. AFTER cost payment, they are tapped previously as well so that 
+                //any mana tapabilities can't be used in payment as well as being tapped for convoke)
+                
+                if(sa.getTappedForConvoke() != null)
+                {
+                    AllZone.getTriggerHandler().suppressMode("Untaps");
+                    for(Card c : sa.getTappedForConvoke()) {
+                        c.untap();
+                        c.tap();
+                    }
+                    AllZone.getTriggerHandler().clearSuppression("Untaps");
+                    sa.clearTappedForConvoke();
+                }
+
             }
 
             @Override
             public void selectButtonCancel() {
+                //If we're paying for a spell with convoke, untap all creatures used for it.
+                if(sa.getTappedForConvoke() != null)
+                {
+                    AllZone.getTriggerHandler().suppressMode("Untaps");
+                    for(Card c : sa.getTappedForConvoke()) {
+                        c.untap();
+                    }
+                    AllZone.getTriggerHandler().clearSuppression("Untaps");
+                    sa.clearTappedForConvoke();
+                }
+                
                 this.stop();
                 this.resetManaCost();
                 payment.cancelCost();

src/main/java/forge/card/spellability/SpellAbility.java

@@ -109,6 +109,8 @@ public abstract class SpellAbility {
         }
     };
     
+    private CardList tappedForConvoke = null;
+
     /**
      * <p>
      * Constructor for SpellAbility.
@@ -1707,4 +1709,27 @@ public abstract class SpellAbility {
         this.chosenTarget = chosenTarget; // TODO: Add 0 to parameter's name.
     }
     
+    public void addTappedForConvoke(Card c)
+    {
+        if(tappedForConvoke == null)
+        {
+            tappedForConvoke = new CardList();
+        }
+        
+        tappedForConvoke.add(c);
+    }
+    
+    public CardList getTappedForConvoke()
+    {
+        return tappedForConvoke;
+    }
+    
+    public void clearTappedForConvoke()
+    {
+        if(tappedForConvoke != null)
+        {
+            tappedForConvoke.clear();
+        }
+    }
+
 }

src/main/java/forge/gui/input/InputPayManaCost.java

@@ -78,10 +78,25 @@ public class InputPayManaCost extends Input {
      * </p>
      *  
      * @param sa
-     *            a {@link forge.card.spellability.SpellAbility} object.
+     *            a  {@link forge.card.spellability.SpellAbility} object.
      */
     public InputPayManaCost(final SpellAbility sa) {
-        this.originalManaCost = sa.getManaCost(); // Change
+        this(sa,new ManaCost(sa.getManaCost()));
+    }
+
+    /**
+     * <p>
+     * Constructor for Input_PayManaCost.
+     * </p>
+     * 
+     * @param sa
+     *            a {@link forge.card.spellability.SpellAbility} object.
+     *            
+     * @param manaCostToPay
+     *            a {@link forge.card.mana.ManaCost} object.
+     */
+    public InputPayManaCost(final SpellAbility sa, final ManaCost manaCostToPay) {
+        this.originalManaCost = manaCostToPay.toString(); // Change
         this.originalCard = sa.getSourceCard();
 
         this.spell = sa;
@@ -95,7 +110,7 @@ public class InputPayManaCost extends Input {
                     AllZone.getStack().add(this.spell);
                 }
             } else {
-                this.manaCost = AllZone.getGameAction().getSpellCostChange(sa, new ManaCost(this.originalManaCost));
+                this.manaCost = manaCostToPay;//AllZone.getGameAction().getSpellCostChange(sa, new ManaCost(this.originalManaCost));
             }
         } else {
             this.manaCost = new ManaCost(sa.getManaCost());
@@ -196,24 +211,42 @@ public class InputPayManaCost extends Input {
                 }
                 AllZone.getInputControl().resetInput();
             }
+            
+            //If this is a spell with convoke, re-tap all creatures used for it.
+            //This is done to make sure Taps triggers go off at the right time
+            //(i.e. AFTER cost payment, they are tapped previously as well so that 
+            //any mana tapabilities can't be used in payment as well as being tapped for convoke)
+            
+            if(spell.getTappedForConvoke() != null)
+            {
+                AllZone.getTriggerHandler().suppressMode("Untaps");
+                for(Card c : spell.getTappedForConvoke()) {
+                    c.untap();
+                    c.tap();
+                }
+                AllZone.getTriggerHandler().clearSuppression("Untaps");
+                spell.clearTappedForConvoke();
+            }
         }
     }
 
     /** {@inheritDoc} */
     @Override
     public final void selectButtonCancel() {
+        //If this is a spell with convoke, untap all creatures used for it.
+        if(spell.getTappedForConvoke() != null)
+        {
+            AllZone.getTriggerHandler().suppressMode("Untaps");
+            for(Card c : spell.getTappedForConvoke()) {
+                c.untap();
+            }
+            AllZone.getTriggerHandler().clearSuppression("Untaps");
+            spell.clearTappedForConvoke();
+        }
+        
         this.resetManaCost();
         AllZone.getHumanPlayer().getManaPool().unpaid(this.spell, true);
         AllZone.getHumanPlayer().getZone(Zone.Battlefield).updateObservers(); // DO
-                                                                              // NOT
-                                                                              // REMOVE
-                                                                              // THIS,
-                                                                              // otherwise
-                                                                              // the
-                                                                              // cards
-                                                                              // don't
-                                                                              // always
-                                                                              // tap
                 
         this.stop();
     }