There was a meeting held by Carmilla Carmine, one of the Overlords of Hell. Velvette revealed the head of an Exorcist Angel. Velvette really wanted Hell to throw a full assault on Heaven, knowing Angels can be killed. But Zestial stopped her.

Zestial: We know not how this perished. Mayhaps t'was not by a demon's hand at all. If we rush to war without knowing, mightn't they purge all of Hell for daring an uprising?