Yorian Spy

When the owner of Yorian Spy casts it from
their hand exile the top card of target opponents library face down, then place this card on top of
your opponents library. As long as Yorian Spy is
in a players hand that doesn't own Yorian Spy,
that player plays with their hand revealed.
When a player that doesn't own
Yorian Spy casts it, it enters the battlefield under
it's owners control.