Iron Maiden

The iron maiden was a medium sized corrupt being  formed from the blood of Victoria, dead rats, metal armors, and a torture device which held Victoria. The being itself had tendrils with rat heads and metal spikes for attack as well as two large eyes. It was responsible for all the deaths inside the execution room at Purge. It constantly tortured Victoria to use her blood to become stronger yet fed her enough to barely keep her alive. When Grace fights, the iron maiden fails to hurt her with its tendrils, instead curling up into a ribcage-like structure around its central body, the torture device holding Victoria. When Grace opens up the torture device, the iron maiden stabs her in a desperate effort to survive. However, Grace synchronizes with it and uses her Heart of Darkness on it, absorbing its strength and using it to fuel hers. Grace rescues Victoria, leaving the iron maiden's dead body to be crushed when the prison collapsed.

The Iron Maiden later appeared inside Grace's Suit, protecting her while she was unconscious, likely at the behest of Aezathol.