Liliana, Heretical Healer #14

Lifelink Whenever another nontoken creature you control dies, exile Liliana, Heretical Healer, then return her to the battlefield transformed under her owner's control. If you do, create a 2/2 black Zombie creature token.

[+2]: Each player discards a card. [-X]: Return target nonlegendary creature card with converted mana cost X from your graveyard to the battlefield. [-8]: You get an emblem with "Whenever a creature dies, return it to the battlefield under your control at the beginning of the next end step."