Chrysalis

Fire iron. Magma crystals. Ash shards. Pyrestone. Along with cores of the demons themselves, these make up just a few of the precious resources that make the third stratum such a hotbed of conflict. For as long as the powers of the world have known of the demon layer, they have fought over it. Territory secured here has always been precious, especially in those areas where the mana flows thick, and the treasures are abundant. Due to a number of factors, such as the difficult of coexistence with the demons and managing the fallout of their endless battles, securing a safe holding is a constant drain on whoever should attempt to do so. The borders between the various powers are thus in a constant state of flux, rich mining grounds changing hands on a weekly basis. Though the rewards are well worth it.

Fire iron. The precious ore can be found within the stone between layers, or indeed in molten pools mixed with lava. Filled to the brim with fire attuned mana, the weapons forged from this material can become so hot that there are reports of them melting the armour of the foes they were used on while there were men inside it. When properly utilised, it's even possible to forge a suit that would allow a being to dive into molten rock and come out unscathed.

Magma crystals are far rarer. An infused form of quartz, these crystals are so dense with concentrated mana that they can spew forth a flow of lava for hours at a time without needing to be recharged. It was the Legionem Abyssi who were the first to learn how to safely carve slivers of from the gems and apply them to the tips of arrows, a trick that might have been better had it never been learned at all.

Ash shards. A grim material that skirts the edges of the forbidden. The power of ash is a breath away from that of disintegration and annihilation. Capable of dissolving a person whole, it is by far the deadliest substance that can be mined in this stratum.

Pyrestone is the one building material that allows a permanent structure to be formed in the land of fire and ash. Without it, putting one brick on top of another and expecting it to be there the next day would be all but impossible. Resistant to heat and seemingly immune to the degrading power of ash, even at the deeper layers where it becomes more potent, Pyrestone is the bedrock of civilised existence within the world of demons.

• from 'The third stratum: a primer' by

even as the carvers began construction of a vast project. It was fascinating to watch it happen, sitting up on my rock it almost reminded of looking at timelapse videos of ants at work. A

of the army remains here, close to me, feverishly building in a long line that extends from my position all the way to the base of the pillar. Fifty minutes later and by now even the demons should have been able to work out what is happening.

was mad, and it was amazing

This is what forty thousand of us can do when we work together in harmony. In a year

sitting around on my backside daydreaming! Eventually the city is going to start to retaliating, firing spells and dropping rocks on us as we build! At that time,

work (think of my reputation!) I rush down into the resting chamber in which my group is already slumbering and prepare to mutate. This mainly involves making sure that nobody can see me, and I'll be protected during