SAC end of time

X: pay X life, return target card with mana cost x or less from your graveyard to the battelfeld, then target opponent draws x cards
-X: sacrefie XX creatures, create X 2/2 Zombie creature token who have:"whenever a creature dies you gain X Life"
-17: choose X: Create a 4/4 Zombie creature token with: "non-zombies have decayed"/"zombies have undying"/"zombies have persist"/"zombies have Infect"