Acnologia, Dragon Slayer King

Suspend 1-{b}{b}(Rather than cast this card from your
hand, you may pay {b}{b} and exile it with a time
counter on it. At the beginning of your upkeep, remove
a time counter. When the last is removed, cast it
without paying its mana cost.)
Deathtouch. Acnologia, Dragon Slayer King's
Power and toughness are equal to everyone's
devotion to black
When you have 7 cards in your graveyard you may
pay 3 life if you do transform this creature Partner