Vessel of Power

Gain control of target creature an opponent
controls with power 3 or less until end of turn.
Give it haste.
Purity {b} - Sacrifice targeted creature at the
beginning of the next end step.
Purity {r} - Deal damage equal to targeted
creature's power to another target creature
an opponent controls.
(When this card is cast, if its cost was paid using
mana of only one color, activate the Purity effect of
the color of mana spent.)