Moved some custom "Cast only" effects to the framework.

Mage/src/main/java/mage/abilities/condition/common/OnOpponentsTurnCondition.java

@@ -0,0 +1,33 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package mage.abilities.condition.common;
+
+import mage.abilities.Ability;
+import mage.abilities.condition.Condition;
+import mage.game.Game;
+
+/**
+ *
+ * @author LevelX2
+ */
+public class OnOpponentsTurnCondition implements Condition {
+
+    private static final OnOpponentsTurnCondition fInstance = new OnOpponentsTurnCondition();
+
+    public static Condition getInstance() {
+        return fInstance;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return !game.getOpponents(source.getControllerId()).contains(game.getActivePlayerId());
+    }
+
+    @Override
+    public String toString() {
+        return "on an opponent's turn";
+    }
+}