BloodMoon Ahri

+1: Create a red 2/1 Priestess Ninja creature token with First Strike
-2: put a BloodMoon Counter on target creature. That creature is a Legendary Demon with Hexproof as long as it has a Blood Moon Counter
-10: You get an Emblem with "Whenever an opponent produces mana that is not red, deal 1 damage to that player"