The Unknown from DbD

Menace At the beginning of your upkeep, create a 0/3 Horror Illusion creature token with “This creature can’t attack or block“ If The Unknown would die while you control a Horror Illusion, instead sacrifice a Horror Illusion and regenerate The Unknown {B}{R}{U},{T}: Put an exposed counter onto target creature (Whenever a creature with an exposed counter is dealt damage, remove an exposed counter from it and it takes doulble that damage instead)