Akrovaa, Necrotic Mummy

Lifelink, Menace
If a non-land permanent is put into your graveyard from the library, you may pay {1}{w}{b}, Sacrifice a creature: Draw two cards and gain 3 life; or pay {2}{w}{b}, Sacrifice a creature: Put two +1/+1 counters on each creature you
control. They gain your choice of menace or lifelink until end of turn.