- NPE prevention in ControlGainAi.

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

@@ -227,6 +227,7 @@ public class ControlGainAi extends SpellAbilityAi {
                     t = ComputerUtilCard.getMostExpensivePermanentAI(list, sa, true);
                 }
 
+                if (t != null) {
                     if (t.isCreature())
                         creatures--;
                     if (t.isPlaneswalker())
@@ -237,6 +238,7 @@ public class ControlGainAi extends SpellAbilityAi {
                         artifacts--;
                     if (t.isEnchantment())
                         enchantments--;
+                }
 
                 if (!sa.canTarget(t)) {
                     list.remove(t);

forge-game/src/main/java/forge/game/spellability/SpellAbility.java

@@ -889,6 +889,10 @@ public abstract class SpellAbility extends CardTraitBase implements ISpellAbilit
     }
 
     public final boolean canTarget(final GameObject entity) {
+        if (entity == null) {
+            return false;
+        }
+
         final TargetRestrictions tr = getTargetRestrictions();
 
         // Restriction related to this ability