- Added an AI cost preference for discard costs, the SVar is called "DiscardMe". Squee, Goblin Nabob is an example.

res/cardsfolder/s/squee_goblin_nabob.txt

@@ -6,6 +6,7 @@ PT:1/1
 T:Mode$ Phase | Phase$ Upkeep | ValidPlayer$ You | TriggerZones$ Graveyard | OptionalDecider$ You | Execute$ TrigChange | TriggerDescription$ At the beginning of your upkeep, you may return CARDNAME from your graveyard to your hand.
 SVar:TrigChange:AB$ChangeZone | Cost$ 0 | Origin$ Graveyard | Destination$ Hand | Defined$ Self
 SVar:SacMe:2
+SVar:DiscardMe:2
 SVar:Rarity:Rare
 SVar:Picture:http://www.wizards.com/global/images/magic/general/squee_goblin_nabob.jpg
 SetInfo:MMQ|Rare|http://magiccards.info/scans/en/mm/214.jpg

src/main/java/forge/ComputerUtil.java

@@ -867,6 +867,22 @@ public class ComputerUtil {
                 }
             }
         }
+        
+        if (pref.contains("DiscardCost")) { // search for permanents with DiscardMe
+            for (int ip = 0; ip < 9; ip++) {    // priority 0 is the lowest, priority 5 the highest
+                final int priority = 9 - ip;
+                CardList SacMeList = typeList.filter(new CardListFilter() {
+                    public boolean addCard(Card c) {
+                        return (!c.getSVar("DiscardMe").equals("") && Integer.parseInt(c.getSVar("DiscardMe")) == priority);
+                    }
+                });
+                if (SacMeList.size() != 0) {
+                    SacMeList.shuffle();
+                    return SacMeList.get(0);
+                }
+            }
+        }
+        
         return null;
     }
 

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

@@ -61,9 +61,16 @@ public class CostUtil {
     
     static public boolean checkDiscardCost(Cost cost, Card source){
         for(CostPart part : cost.getCostParts()){
-            if (part instanceof CostDiscard)
+            if (part instanceof CostDiscard) {
+                CostDiscard disc = (CostDiscard)part;
+                
+                String type = disc.getType();
+                CardList typeList = AllZoneUtil.getPlayerHand(AllZone.getComputerPlayer());
+                typeList = typeList.getValidCards(type.split(","), source.getController(), source);
+                if (ComputerUtil.getCardPreference(source, "DiscardCost", typeList) == null)
                     return false;
             }
+        }
         return true;
     }