YAY! The art got used
Interesting concept. Its a bit like cloak in a lot of ways, but more tricky to destroy.
Since it effectively lets you use any permanents regardless of cost, balancing could be a bit tricky. Shields and weapons being exempt will help though. The biggest use I see for it is in an unstable gas based deck.
... By the way, what happens if someone uses the air nymph ability to create a gas while this is in play? Does it nullify the ability?