Niliska, Queen of the Damned

Flying, Trample, Indestructible, Hexproof
When Niliska, Queen of the Damned enters
the battlefield, create X 2/2 zombie tokens.
At the beginning of your endstep, sacrifice a permanent under you control, otherwise
exile Niliska, Queen of the Damned.
"Death runs through my veins, rot coats my
hide, only from death can we live."