A Pact With Belzenlok

Return all creatures from your graveyard to the battlefield under your control. Creatures you
control get +4/+4, menace, haste, and trample.
At the end of turn, you lose the game.
If you control a card named Demonlord
Belzenlok, this spell cant be countered.
(You may cast a legendary sorcery only if you control
a legendary creature or planeswalker.)