Curseblade Labirith

Whenever Curseblade Labirith deals combat damage to a creature or player, exile the top two cards of your library. You may cast one of them this turn without paying its mana cost.

Whenever Curseblade Labirith is blocked, the defending player loses 3 life unless they sacrifice a creature.

When Curseblade Labirith dies, you may pay 4 life. If you do, return it to the battlefield tapped.