Ramsey, Master Manipulator

When Ramsey enters the battlefield, put a
legendary 1/1 red, blue, and black snake creature
token named Kaa with "{t}Tap target creature.
It does not untap until its controller's next untap
step."
When Ramsey leaves the battlefield, exile Kaa.
{x}{u}{b}{r}: Gain control of target creature with converted mana cost X or less until Ramsey
leaves the battlefield.