Zylnori, Archmage of Chaos

When this Creature enters each player rolls {x} d6. Each player loses that much life. Then they roll {x} d6, each player gains that much life.

Exile {x} instant or sorcery spells from your graveyard when this creature enters, you may cast these spell from exile by paying life equal to their mana cost, as long as Zylnori, Archmage of Chaos, is on the board. If you cast a spell without paying mana, draw a card.

{x}{u}{b}{g} - Exile Zylnori, Archmage of Chaos, and return it to play under target player