A Study on Monsters

What are monsters? How do these creatures from behind the Door exist and continue to live? Are they plucked from elsewhere or are they simply created from nothing and left within these spaces? What can we do with the corpses of these monsters?

What are they?

Simply put these animals and other creatures have several similarities to the animals found here, but their differences are far too large to say they can be found in the same families as those found naturally here. These are creatures that have come to show abilities and sometimes even magic similar to that of Divers or those people whom have undergone "Ignition". 

Where do they come from?

These monsters can be found in many different forms and host vastly different abilities dependent on what can only be thought of as their environment and functions needed to survive, much like the evolution of our own animals and people. We have conducted research into their differences between each of them and have found that they have distinct environments that each of the Doors portray reflect the origin of the monsters found within. In theory from all reported Doors there seem to be at least eight different potential environments that can be portrayed that these monsters originate from, but we are unsure how many more their might be. This being said, it is theorized that these environments could not be randomly chosen by something and must have been copied from somewhere else, maybe another planet or even more radically another alternate universe all together.
Considering the monsters themselves, with their environments they have been categorized into different species that are currently proven to be correct through the use of the unique skill, REDACTED. With this skill the following species have been recorded: Wildwalker, Treant, Spirit, Goblinoid, Beastman, Insectoid, Gigantus and all animal like monsters have been categorized as Beast for the general descriptor. These species are still appearing to us and we work even now to understand these different creatures and what sets them apart from each other. 

What can we do with them?

Much like skinning an animal on Earth, it seams these creatures can be skinned and butchered as well as any other animal, though special equipment made from an alloy of mana crystal and steel have proven to be effective when cutting the hides and skin of the monsters. The pelts, scales, chitin, webbing, and other materials found of and within them have been found useful when making items and gear for Divers to better protect them when fighting, the clothing made from it has also been picked up in fashion. The insides and flesh have been found to have vastly different flavors than our own meats in animals on Earth making them highly coveted in gourmet, the rest of the insides have also found use in the research of magical components and what can be called "Alchemy" a magical chemistry if you will. There are even "Monster Cores" found in these beings that are points of crystallized mana within them than can be used to power Divers and technology that is in development alike.