X
Unstable (UST)
X
Legendary Creature — Human Spy
As long as X is in X's owner's opponent's hand, X's owner may cast X and activate X's abilities. That opponent can't cast X and plays with their hand revealed., 
: Put X into target opponent's hand.
: You may play a land or cast a spell from the hand X is in. If you cast a spell this way, you cast it without paying its mana cost.
