Assassin's Leap of Faith

A target Assassin creature you control becomes controlled by a target player. Target player
cannot have target Assassin attack, block or
activate any of its abilities. At the beginning of
your next upkeep, target Assassin deals damage
equal to its power to any target you don't control,
you then regain control of the target Assassin.
"Show this fool knight what it means to have no
fear. Go to God!"
—Al Mualim