Implemented Cloudpiercer

Mage/src/main/java/mage/abilities/keyword/MutateAbility.java

@@ -0,0 +1,39 @@
+package mage.abilities.keyword;
+
+import mage.abilities.SpellAbility;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.cards.Card;
+import mage.constants.SpellAbilityType;
+import mage.constants.TimingRule;
+
+public class MutateAbility extends SpellAbility {
+
+    public MutateAbility(Card card, String manaString) {
+        super(new ManaCostsImpl(manaString), card.getName() + " using mutate");
+        this.spellAbilityType = SpellAbilityType.BASE_ALTERNATE;
+        this.timing = TimingRule.SORCERY;
+        // TODO: Implement this
+    }
+
+    private MutateAbility(final MutateAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public MutateAbility copy() {
+        return new MutateAbility(this);
+    }
+
+    @Override
+    public String getRule(boolean all) {
+        return getRule();
+    }
+
+    @Override
+    public String getRule() {
+        return "Mutate " + getManaCostsToPay().getText() + " <i>(If you cast this spell for its mutate cost, " +
+                "put it over or under target non-Human creature you own. " +
+                "They mutate into the creature on top plus all abilities from under it.)</i>";
+    }
+
+}