Sweet card idea, light creature protection, with a downside. Very versatile, which is always great, I love cards which you will use differently between games.
I'm not going to pretend I understand the name, or the theory behind it, but basically, it's a permanent for air, and it's awesome.
Also agreeing with the +1 damage thing. With a card like this, where you won't always be able to plan how you're playing it, it doesn't make a huge amout of sense to put a potentially large change in the mechanic. (Like upgrading a firefly to use in a hope deck... what?)
For voodoo - immaterial is good, that screws things up. Also maybe negating the effects of a shield for two turns? (Shield becomes transparent/ish so you can see that its effects will do nothing)