Vraska, Veiled Huntress

+1: Sacrifice a creature. Put loyalty counters on Vraska, Veiled Huntress equal to sacrificed creatures converted mana cost.
-X: Exile X target creature cards from your graveyard. Add X mana in any combination of black or green mana to your mana pool and you lose X life.
-13: Exile all other permanents, then put all creatures from exile onto the battlefield under your control.