- Fixed AI for Tribute to the Wild.

src/main/java/forge/card/abilityfactory/AbilityFactorySacrifice.java

@@ -398,14 +398,17 @@ public class AbilityFactorySacrifice {
             tgt.resetTargets();
             if (AllZone.getHumanPlayer().canBeTargetedBy(sa)) {
                 tgt.addTarget(AllZone.getHumanPlayer());
+                return true;
             } else {
                 return false;
             }
-        } else {
+        }
+
         final String defined = params.get("Defined");
         if (defined == null) {
             // Self Sacrifice.
-            } else if (defined.equals("Each")) {
+        } else if (defined.equals("Each") 
+                || (defined.equals("Opponent") && !sa.isTrigger())) {
             // If Sacrifice hits both players:
             // Only cast it if Human has the full amount of valid
             // Only cast it if AI doesn't have the full amount of Valid
@@ -424,6 +427,9 @@ public class AbilityFactorySacrifice {
             CardList humanList = AllZone.getHumanPlayer().getCardsIn(ZoneType.Battlefield);
             humanList = humanList.getValidCards(valid.split(","), sa.getActivatingPlayer(), sa.getSourceCard());
             CardList computerList = AllZone.getComputerPlayer().getCardsIn(ZoneType.Battlefield);
+            if (defined.equals("Opponent")) {
+                computerList = new CardList();
+            }
             computerList = computerList.getValidCards(valid.split(","), sa.getActivatingPlayer(),
                     sa.getSourceCard());
 
@@ -433,7 +439,6 @@ public class AbilityFactorySacrifice {
                 return false;
             }
         }
-        }
 
         return true;
     }