The Epitome of Beings

When The Epitome of Beings enters the battlefield, you may exile up to three target creatures. The Epitome of Beings gets +1/+1 counter for each creature exiled this way.
When The Epitome of Beings leaves the battlefield, return the exiled cards to the battlefield under your control. Each of those cards is a black Mutant creature in addition to its other colors and types with base power and toughness 1/1.