[WHO] Implement Adipose Offspring (#11570)

* EmergeAbility take a string instead of a ManaCosts object

* Save Emerge's sacrificed creature MOR in a costs tag

* Implement Adipose Offspring

* Fix costs tag clearing while permanent still on the battlefield

* improved version of game.getPermanentOrLKIBattlefield with MageObjectReference

* Use correct Alien token

* cleanup imports

* merge fix

Mage/src/main/java/mage/game/permanent/token/AlienToken.java

@@ -0,0 +1,29 @@
+
+package mage.game.permanent.token;
+
+import mage.MageInt;
+import mage.constants.CardType;
+import mage.constants.SubType;
+
+/**
+ * @author notgreat
+ */
+public final class AlienToken extends TokenImpl {
+
+    public AlienToken() {
+        super("Alien Token", "2/2 white Alien creature token");
+        cardType.add(CardType.CREATURE);
+        color.setWhite(true);
+        subtype.add(SubType.ALIEN);
+        power = new MageInt(2);
+        toughness = new MageInt(2);
+    }
+
+    protected AlienToken(final AlienToken token) {
+        super(token);
+    }
+
+    public AlienToken copy() {
+        return new AlienToken(this);
+    }
+}