Skin of Illusion

Skin of Illusion enter the battlefield disguised as a playable basic Green Land card.
Flash At any point during a combat phase you
may swap on of your creatures with one from your
deck that costs {1} more. Discard this card.
If you control all four skin cards, you concede,
giving your opponent the victory. Thereafter you
may smirk and flip over all deceit cards to reveal
it was in fact you who is the victor.
You fool, it was I...