Jenova, the Calamity

Defender
When this creature enters the battlefield exile the
top 10 cards of your library and put 4 reunion counters on it.
Remove a reunion counter, {t}: Put a 4/4 color-
less horror creature token with haste on to the
battlefield under your control. You may play
one card exiled with Jenova this turn without
paying it's mana cost.
At the beginning of your end step, if there are no reunion counters on Jenova, sacrifice it.