Ix, Nimbus Mystified

Flying, Bastion
At the beginning of your upkeep, look at the top
X cards of your library, where X is the number
of cards exiled with Ix. Place one of them in your
hand and the rest at the bottom of your library in
any order.
When Ix becomes the target of a spell your
opponent controls, counter that spell unless
your opponent pays {x}, where X is the number
of cards exiled with Ix.