Nyxshade Hag

Flying, Deathtouch

At the beginning of your upkeep, exile the top card of each opponent's library.
You may cast one of those cards this turn. You may spend mana as though it were mana of any color to cast it.

Whenever a creature an opponent controls dies, create a 1/1 black spirit token with "Sacrifice this creature: Scry 1."

"She harvests the lost and forgotten, one soul at a time."