Nyx, Mother of the Death

Lifelink, menace
When Nox, Mother of Death enters the battlefield, mill three cards. You may cast a card
from among those cards without paying it's mana
costs. If you do, you lose life equal to its mana
value.
When Nox would be exiled or is put into a
graveyard from anywhere, scry 2 and put Nox
on top of your library.