[He nods. He suspected that. It's not an easy thing to do. As he has already expressed, he has doubts at his current level of experience with such things, he could have done it to Crowley without discorporating him or worse.

But that's Crowley. Not himself.]

If I have the proper glyph, I can do it to myself to the same effect. It's not about who does it. It's about the sigil. Your infernal name would be enough.