Possessed has does not make Ancient One attack himself

[noosphereintern]

I'm not sure what else to add here. I should be more specific, the adds had already been killed, and the Boss gained the stun status, the possessed status, and skipped his turn, but did not deal his own Max HP in damage to himself. Then the Possessed status wore off to no further effect.

It is possible that this is intended, in which case the bug exists that other Act Bosses and single targets do inflict max damage on themselves, instead of an ally.