- Added rudimentary AI logic for Timetwister and promoted it to AI playable.

- This completes the project to get the basic AI logic for the remaining Power Nine cards.

forge-ai/src/main/java/forge/ai/SpecialCardAi.java

@@ -233,6 +233,31 @@ public class SpecialCardAi {
             return false; // haven't found anything to play with the excess generated mana
         }
     }
+
+    // Timetwister
+    public static class Timetwister {
+        public static boolean consider(Player ai, SpellAbility sa) {
+            final int aiHandSize = ai.getCardsIn(ZoneType.Hand).size();
+            int maxOppHandSize = 0;
+
+            final int HAND_SIZE_THRESHOLD = 3;
+
+            for (Player p : ai.getOpponents()) {
+                int handSize = p.getCardsIn(ZoneType.Hand).size();
+                if (handSize > maxOppHandSize) {
+                    maxOppHandSize = handSize;
+                }
+            }
+
+            if (aiHandSize < HAND_SIZE_THRESHOLD || maxOppHandSize - aiHandSize > HAND_SIZE_THRESHOLD) {
+                // use in case we're getting low on cards or if we're significantly behind our opponent in cards in hand
+                return true;
+            }
+
+            return false;
+        }
+    }
+    
     // Yawgmoth's Bargain
     public static class YawgmothsBargain {
         public static boolean consider(Player ai, SpellAbility sa) {

forge-ai/src/main/java/forge/ai/ability/ChangeZoneAllAi.java

@@ -11,6 +11,7 @@ import forge.ai.ComputerUtil;
 import forge.ai.ComputerUtilCard;
 import forge.ai.ComputerUtilCombat;
 import forge.ai.ComputerUtilCost;
+import forge.ai.SpecialCardAi;
 import forge.ai.SpellAbilityAi;
 import forge.game.Game;
 import forge.game.ability.AbilityUtils;
@@ -70,6 +71,10 @@ public class ChangeZoneAllAi extends SpellAbilityAi {
         CardCollectionView computerType = ai.getCardsIn(origin);
         computerType = AbilityUtils.filterListByType(computerType, sa.getParam("ChangeType"), sa);
         
+        if (source.getName().equals("Timetwister")) {
+            return SpecialCardAi.Timetwister.consider(ai, sa);
+        }
+        
         // Ugin AI: always try to sweep before considering +1 
         if (source.getName().equals("Ugin, the Spirit Dragon")) {
             final int loyalty = source.getCounters(CounterType.LOYALTY);

forge-gui/res/cardsfolder/t/timetwister.txt

@@ -1,8 +1,7 @@
 Name:Timetwister
 ManaCost:2 U
 Types:Sorcery
-A:SP$ ChangeZoneAll | Cost$ 2 U |  ChangeType$ Card | Origin$ Hand,Graveyard | Destination$ Library | Shuffle$ True | Random$ True | SubAbility$ DBDraw | UseAllOriginZones$ True | SpellDescription$ Each player shuffles his or her graveyard and hand into his or her library, then draws seven cards.
+A:SP$ ChangeZoneAll | Cost$ 2 U |  ChangeType$ Card | Origin$ Hand,Graveyard | Destination$ Library | Shuffle$ True | Random$ True | SubAbility$ DBDraw | UseAllOriginZones$ True | AILogic$ TimeTwister | SpellDescription$ Each player shuffles his or her graveyard and hand into his or her library, then draws seven cards.
 SVar:DBDraw:DB$ Draw | NumCards$ 7 | Defined$ Player
-SVar:RemAIDeck:True
 SVar:Picture:http://www.wizards.com/global/images/magic/general/timetwister.jpg
 Oracle:Each player shuffles his or her hand and graveyard into his or her library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)