"It's not the Azata. We don't recognize the scent." Hexor says, sounding rather irritated by this. "Nor can we work out where they are, probably because of invisibility. Vexor is guarding the entrance to the Sanctum, and the Thrice-Damned..."

"Is here." Ezra says, passing through the far wall. Two of his wraith spawn are with him. "If the Azata is not here, then this is likely an opportunistic raid. Something drawn in from the upper planes by the scent of the ritual."