Yhorm the Giant

Whenever Yhorm enters the battlefield, sacrifice it unless it escaped.

Whenever Yhorm enters the battlefield or attacks, each opponent discards a card, then each opponent
who didn’t discard a non land card this way lose 3 life.

Escape - {b}{b}{g}{g}, Exile 3 other cards from your graveyard. (You may cast this card from graveyard for its escape cost.)