Field of Slaughter

As Field of Slaughter enters the battlefield choose an opponent. That player gains control of Field of Slaughter.

{t}: Add one mana of any color and clash with an
opponent. (Each clashing player reveals the top card
of their library, then puts that card on the top or
bottom. A player wins if their card had a higher
mana value.) If you lose, that opponent gains control
of it and its owner creates a 1/1 black and red
skeleton creature token.