I thought the Moth Preist failed to acheive CHIM and went poof. What's a Moth Priest doing with CHIM anyway? Those guys are useless!
The Zero Sum outcome (POOOOF!!) is what happens when you "Fail to hold that dawning of realization together", and you dissolve into a zero sum.
Vivec is currently holding that dawning together, and as such, has CHIM-- however, if he "loses" it, he will fail to hold that dawning together, his tower will crumble, and he will zero sum.
POOF!