Slythe, the Obtainer

{3}{b/r}{b/r}, Sacrifice a creature: Gain control of target artifact until end of turn. Untap it. If it's a creature, it gains haste until end of turn.
Whenever you gain control of a noncreature artifact, Slythe gains skulk until end of turn. Whenever you gain control of an artifact creature, Slythe gains first strike until end of turn.
"I am a god among these men. Gods need sacrifices."