Subtle Thievery

While Subtle Thievery is in your hand, you may
move one of another player's permanents onto
your side of the battlefield. If that player notices
before the end of turn, reveal your hand then
exile Subtle Thievery. Otherwise, at end of turn
you may exile Subtle Thievery, if you do, gain
control of that permanent.
"Looks like we have a cheater" - Your opponent