Ragendrav, Voice of Shadows

First strike, vigilance, lifelink.
Sacrifice X ink token you control: until end of
turn, you may play taget instant card with mana
value of X from your graveyard without paying
it's mana cost. If that spell would be put into
your graveyard this turn, exile it instead.
At the beginning of each end step, if you control
less than 10 ink token, transform Ragendrav,
Voice of Shadows.