Kroxa, Titan of Death's Hunger

When Kroxa enters the battlefield, sacrifice it
unless it escaped.
Whenever Kroxa enters the battlefield or attacks,
each opponent discards a card, then each
opponent who didn't discard a nonland card this
way loses 3 life.
Escape—{b}{b}{r}{r}, Exile five other cards from
your graveyard. (You may cast this card from
your graveyard for its escape cost.)