fixed issue with Kruphix, God of Horizons and Horizon Stone causing endless replacement effect loop

Mage/src/main/java/mage/Emptiable.java

@@ -0,0 +1,15 @@
+package mage;
+
+import mage.constants.ManaType;
+
+/**
+ * @author TheElk801
+ */
+public interface Emptiable {
+
+    public void add(ManaType manaType, int amount);
+
+    public void clear(ManaType manaType);
+
+    public int get(final ManaType manaType);
+}