--
Boom! Boom! Boom!
A multitude of explosions occurred within the caged battlefield, leaving fierce aftershocks. The Humans and Sin Demons clashed intent to kill, with each party determined to never let the others see the light of tomorrow.
Due to the bountiful well of power these Sin Demons could tap into, the humans found it difficult to truly leave a lasting injury on any of them since they could just heal it on the next second. The energy reserves of humans weren't that shabby to begin with, but compared to how much there is in those insignia of sins, it's truly lacking.
This, in addition to the unique properties of each sin demon, made it very challenging to slay them, especially now that they're wary of humans after they killed Big Sloth. The concept of mortality being forced upon them made them very careful when dealing with humans, which in turn made them harder to kill.