Mind Stone

When Mind Stone enters the battlefield, Gain
control of target creature target opponent
controls. That creature remains under your
control until it fights another creature
with power 1 or greater.
{t}, Add {u}{u} to your mana pool.
{t}{u}{u}, Gain control of target creature, until end
of turn. It untaps and gains haste.
Someone has been playing an intricate game. -Thor