Mori Calliope, Soul Slicer

Deathtouch, Menace
Whenever a creature is sacrificed, put a +1/+1
counter on Mori Calliope.
{x}{x}{b}, Sacrifice another creature: Scry X, then
draw a card. X cannot be 0.
You may cast Mori Calliope from your graveyard
by tapping 3 creatures you control in addition to paying her other costs. If you do, sacrifice those creatures when she enters the battlefield.