They weren't willing to take even a fraction of a percent of a risk, choosing instead to pile on as many heavy restraints as the dark cell could physically accommodate to ease their own profound anxiety.
The heavy links wrapping tightly around his dark form were not just ordinary pieces of metal, as those were extremely powerful, high-tier suppressing chains that worked tirelessly around the clock, continuously sucking away the little bits of nether the beaten demon had left inside his physical vessel.
Every single loop of the dark iron was heavily carved with ancient runic symbols that throbbed with a faint, predatory light, acting like a magical sponge that pulled out his internal reserves and dispersed them harmlessly into the surrounding stone walls, leaving him in a permanent state of severe exhaustion.
