- Implemented AI for Atarka's Command

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

@@ -290,6 +290,11 @@ public class ChangeZoneAi extends SpellAbilityAi {
             if (!activateForCost && list.isEmpty()) {
                 return false;
             }
+            if ("Atarka's Command".equals(source.getName()) 
+            		&& (list.size() < 2 || ai.getLandsPlayedThisTurn() < 1)) {
+            	// be strict on playing lands off charms
+            	return false;
+            }
 
             String num = sa.getParam("ChangeNum");
             if (num != null) {

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

@@ -213,7 +213,10 @@ public class DamageDealAi extends DamageAiBase {
      */
     private boolean damageTargetAI(final Player ai, final SpellAbility saMe, final int dmg, final boolean immediately) {
         final TargetRestrictions tgt = saMe.getTargetRestrictions();
-
+        if ("Atarka's Command".equals(saMe.getHostCard().getName())) {
+        	// playReusable in damageChooseNontargeted wrongly assumes that CharmEffect options are re-usable
+        	return this.shouldTgtP(ai, saMe, dmg, false);
+        }
         if (tgt == null) {
             return this.damageChooseNontargeted(ai, saMe, dmg);
         }

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

@@ -149,6 +149,17 @@ public class EffectAi extends SpellAbilityAi {
                     }
                 }
                 randomReturn = threatened;
+            } else if (logic.equals("NoGain")) {
+            	// basic logic to cancel GainLife on stack
+                if (game.getStack().isEmpty()) {
+                    return false;
+                }
+                final SpellAbility topStack = game.getStack().peekAbility();
+                if (topStack.getActivatingPlayer() == ai.getOpponent() && topStack.getApi() == ApiType.GainLife) {
+                	return true;
+                } else {
+                	return false;
+                }
             } else if (logic.equals("Fight")) {
                 CardCollection humCreatures = ai.getOpponent().getCreaturesInPlay();
                 humCreatures = CardLists.getTargetableCards(humCreatures, sa);