L'Rell, Fierce Visionary

At the beginning of combat on your turn, create a 2/1 red Klingon Warrior creature token with haste. Sacrifice it at the beginning of the next end step. {2}, Sacrifice another creature or artifact: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

"Conquer us, or we will never relent."