Heinous Ritual

This spell costs {1} less to cast for each creature that died under your control this turn.

Each opponent sacrifices a creature, then you may choose one —
• Return target creature card from a graveyard to
the battlefield, except it's a black Zombie in addition to it's other colors and types.
• Create a 6/6 black Horror creature token with
"At the beginning of your upkeep, mill a card."