Sacred Imprisonment

Exile target creature.
So long as target creature remains exiled you
may place X 0/1 white and black cleric tokens
into play at the beginning of your turn, where X
equals target creatures converted Mana cost.
If Sacred imprisonment is removed from play
destroy all cleric tokens in play and put target creature back onto the battlefield, it gets a +1/+1 counter
on it for each cleric token destroyed in this way.