- chainDmg not null is already ensured on top

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

@@ -241,11 +241,9 @@ public class DamageDealAi extends DamageAiBase {
             } else {
                 // we are about to decide to play this damage spell; if there's something chained to it, reserve mana for
                 // the second spell so we don't misplay
-                if (chainDmg != null) {
                 AiController aic = ((PlayerControllerAi)ai.getController()).getAi();
                 aic.reserveManaSourcesForNextSpell(chainDmg.getKey(), sa);
             }
-            }
         } else {
             // simple targeting when there is no spell chaining plan
             if (!this.damageTargetAI(ai, sa, dmg, false)) {