Cat Mage, Master of Meows

+3: Prevent all damage that would be done this turn. You may tap one of your opponent's creatures. It does not untap during their upkeep step
+6: Destroy all tapped creatures. You gain 2 life for each creature destoyed
-8: Transform Cat Mage, Master of Meows into an 8/8 Cat God with First Strike, Deathtouch, Lifelink, Trample, Hexproof, and Flying.