- Added Chain of Smog with basic AI support when the player casts it targeting AI, it will only continue the chain if it ends up having no cards in hand. The AI itself currently does not know when/how to time it properly when casting it from hand (will always cast it),

.gitattributes

@@ -65,6 +65,7 @@ forge-ai/src/main/java/forge/ai/ability/CloneAi.java -text
 forge-ai/src/main/java/forge/ai/ability/ControlExchangeAi.java -text
 forge-ai/src/main/java/forge/ai/ability/ControlGainAi.java -text
 forge-ai/src/main/java/forge/ai/ability/CopyPermanentAi.java -text
+forge-ai/src/main/java/forge/ai/ability/CopySpellAbilityAi.java -text
 forge-ai/src/main/java/forge/ai/ability/CounterAi.java -text
 forge-ai/src/main/java/forge/ai/ability/CountersAi.java svneol=native#text/plain
 forge-ai/src/main/java/forge/ai/ability/CountersMoveAi.java -text
@@ -3565,6 +3566,7 @@ forge-gui/res/cardsfolder/c/ceta_sanctuary.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/c/cetavolver.txt -text
 forge-gui/res/cardsfolder/c/chain_lightning.txt -text
 forge-gui/res/cardsfolder/c/chain_of_plasma.txt -text
+forge-gui/res/cardsfolder/c/chain_of_smog.txt -text
 forge-gui/res/cardsfolder/c/chain_of_vapor.txt -text
 forge-gui/res/cardsfolder/c/chain_reaction.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/c/chain_stasis.txt -text

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

@@ -45,7 +45,7 @@ public enum SpellApiToAi {
             .put(ApiType.Cleanup, AlwaysPlayAi.class)
             .put(ApiType.Clone, CloneAi.class)
             .put(ApiType.CopyPermanent, CopyPermanentAi.class)
-            .put(ApiType.CopySpellAbility, CanPlayAsDrawbackAi.class)
+            .put(ApiType.CopySpellAbility, CopySpellAbilityAi.class)
             .put(ApiType.ControlPlayer, CannotPlayAi.class)
             .put(ApiType.ControlSpell, CannotPlayAi.class)
             .put(ApiType.Counter, CounterAi.class)

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

@@ -0,0 +1,55 @@
+package forge.ai.ability;
+
+import forge.ai.SpellAbilityAi;
+import forge.game.player.Player;
+import forge.game.spellability.SpellAbility;
+import forge.game.zone.ZoneType;
+
+import java.util.List;
+
+public class CopySpellAbilityAi extends SpellAbilityAi {
+
+    @Override
+    protected boolean canPlayAI(Player aiPlayer, SpellAbility sa) {
+        return false;
+    }
+
+    @Override
+    protected boolean doTriggerAINoCost(Player aiPlayer, SpellAbility sa, boolean mandatory) {
+        return false;
+    }
+
+    @Override
+    public boolean chkAIDrawback(final SpellAbility sa, final Player aiPlayer) {
+        // NOTE: Other SAs that use CopySpellAbilityAi (e.g. Chain Lightning) are currently routed through
+        // generic method SpellAbilityAi#chkDrawbackWithSubs and are handled there.
+
+        if ("ChainOfSmog".equals(sa.getParam("AILogic"))) {
+            if (aiPlayer.getCardsIn(ZoneType.Hand).size() == 0) {
+                // avoid failure to add to stack by providing a legal target
+                // TODO: this makes the AI target opponents with 0 cards in hand, but bailing from here causes a
+                // "failed to add to stack" error, needs investigation and improvement.
+                Player targOpp = aiPlayer.getOpponent(); 
+
+                for (Player opp : aiPlayer.getOpponents()) {
+                    if (opp.getCardsIn(ZoneType.Hand).size() > 0) {
+                        targOpp = opp;
+                        break;
+                    }
+                }
+
+                sa.getParent().resetTargets();
+                sa.getParent().getTargets().add(targOpp);
+                return true;
+            }
+        }
+
+        return super.chkAIDrawback(sa, aiPlayer);
+    }
+
+    @Override
+    public SpellAbility chooseSingleSpellAbility(Player player, SpellAbility sa, List<SpellAbility> spells) {
+        return spells.get(0);
+    }
+}
+

forge-gui/res/cardsfolder/c/chain_of_smog.txt

@@ -0,0 +1,9 @@
+Name:Chain of Smog
+ManaCost:1 B
+Types:Sorcery
+A:SP$ Discard | Cost$ 1 B | ValidTgts$ Player | NumCards$ 2 | Mode$ TgtChoose | SubAbility$ DBCopy | SpellDescription$ Target player discards two cards. That player may copy this spell and may choose a new target for that copy.
+SVar:DBCopy:DB$ CopySpellAbility | Defined$ Parent | Controller$ TargetedPlayer | AILogic$ ChainOfSmog | StackDescription$ None
+SVar:RemAIDeck:True
+SVar:Picture:http://www.wizards.com/global/images/magic/general/chain_of_smog.jpg
+Oracle:Target player discards two cards. That player may copy this spell and may choose a new target for that copy.
+