Monster Souls

A 'Monster Soul' is a soul just filled with magic, their whole body and emotions are filled with magic and purely consist of magic, even their body's. For example like a skeleton is able to continue living due their magic. Skeletons can as well 'ressurrect' the dead and forming new skeletons.

This is a monster soul, it's held by 90% of the whole underground, the other 10% by the strongest monsters, that hold a boss monster soul, or a fused soul. The fused and Boss monster souls are later on explained to be stronger and more resilliant souls aswell able to pass the barrier if having a human soul. Though since the barrier was never castet it was never needed. The monsters in the underground got stronger and stronger, forming the new generation of even stronger souls

"Berserk" soul is a monster soul with a lot of DT instead of Magic, they still have magic, though it's mostly enpowered by DT. When they get angered, some transform into a 2nd stage. That makes the monster larger increasing their DEF and ATK for who knows how long until they calm back down. They are just brute's in terms of CQC (Close Quater Combat), There's a skeleton known to having this soul and is one of the royal guards (Unknown Character)