[Whewt22]

Hmm nevermind I figured it out as soon as I submitted it, I said it in another thread somewhere. It requires a strong soul, hinted at by Aizen when he said an ordinary soul can't handle it. Also why he used lt's. and captain classes. For the mask to be formed first, the spirit must be strong enough to resist?
I guess its a given that kiskue infected him with whatever it was. Aizen used.