Break into a heavily fortified prison in Vesper's third Mirror of Mystery! Deep within his mountain stronghold, Fyodor the Soul Warden lords over his horde of lost souls.
In order to break their chains, you'll need to work past his murderous mechanized defenses, including terror-powered turrets, blazing furnaces, and bone-crushing hammers. But keep your wits about you, lest you become yet another of his captive souls!
Vesper seems particularly keen on you putting Fyodor in his place, though her motives remain shrouded in mystery—for the moment, anyway.