The biological weapon created by Fallman.
Developed by Dr. Crow, it gives the possessor the power to regenerate one's body and various other things with their flesh, blood, and bone.
Also called as "Devil's Own"
Rinkle and Deltemir faces against one of Devil's Own caught as prisoners of war by Iristar. They fight against the Devil's Own in order to pass their exam.
The Devil's Own appearing here showed the ability to shift form, regenerate, and make their blood explosive.