Dark Betrayal

Choose one or both:
•Destroy target creature an opponent controls.
•Gain control of target creature an
opponent controls.
"At least were in this together," said the first guard.
"Oh, I wouldn't be so sure," said the second guard.
"What do you mean asked the first guard.
"What I mean is this," said the second guard,
jamming a knife into the other's thigh.