Cthulhu The Old One

When Cthulhu is in the command zone or in the battlefield.
you may reveal a card from your hand
Exile that card. It has X slumber
Counters on it were X that cards mana cost
at the beginning of your upkeep,
you may remove a slumber counter
when there are no slumber counters on
that card put it on the battlefield or cast it.
Partner With Azazthoth