if multiple permanents come to battlefield at the same time, they are aware now of each other. (e.g. useful for for Valakut, the Molten Pinnacle).

Mage/src/mage/game/GameImpl.java

@@ -1790,6 +1790,11 @@ public abstract class GameImpl<T extends GameImpl<T>> implements Game, Serializa
         return state.getPriorityPlayerId();
     }
 
+    @Override
+    public void addSimultaneousEvent(GameEvent event) {
+        state.addSimultaneousEvent(event, this);
+    }
+
     @Override
     public void fireEvent(GameEvent event) {
         state.handleEvent(event, this);