The time to clear out the floors was getting longer and longer, mainly due to the size of said floors, Yunan was still fully mapping each floor even if he did max out on his stat points, and usually that would get him some nice hidden stumbleupon rewards, this floor gave him a very good thing, it was a birthing nest of ice wraiths, these little suckers were nothing more than mana and ice, they hated warmth and attacked anything warmer than they were.
The ice wraiths were not living creatures per say, they were more like, magical golems, the could exist thanks to their mana veins that provided some functionality to the icy husk, in the nest Yunan found himself the method of birthing ice wraiths, there was a mana source injecting its excess mana into the ice around it and giving it a semblance of life, the mana source was a colony of ants that lived by devouring ice, the devoured ice would then be turned into mana that would be absorbed as nutrition for the ants as well as the underground echo system that sprouted with them, the deeper Yunan delved into the ant colony the more warmth and variety of species he found residing under the ice, when Yunan asked the Black Fate about the answer was a bit shocking.
Ice wraiths were accidentally created to be the monsters of this floor, this floor was supposed to be a warm one at first and full of underground monsters, it was a trial floor that was not supposed to be here at first, during the trials, a species of ants started to take the magical ice and turn it back to mana that can be absorbed by other species effectively creating an ecosystem in a place where only ice creatures should dwell, the ice wraiths were a by-product from the excess mana that was not digested by the ecosystem and was thus expelled outside of the ant nest.
Yunan spent the better part of his year in this floor studying the formation of ice wraiths and the ants that formed such a peculiar evolution. Mana beings have evolved to emit mana after digesting ordinary things, but these anta chose to take mana from the magic made ice and disperse the mana inside it, and the other beings inside the nest also evolved to use mana as nutrition instead of rely on biological matter, and since the magical ice was forming without stop, the ants have found and equilibrium between consuming it and waiting for it to regenerate, this balanced system resulted in excess mana du to the limited numbers of creatures consuming the mana, and by proxy create the ice wraiths.
All the observations Yunan made were used on developing the battle toys, giving the toys mana veins instead of making mana flow in a closed circuit was better for the mechs, since they would be more efficient in using mana and saving much on the wasted mana when it traveled from the mana core to the extremities, Yunan also designed a disposal system that converted magical items into mana. The first test was the guild warehouses, thanks to the great number of adventurers, the guild had an endless supply of magical items that never leave the vaults, and when Yunan asked to buy those warehouses full of useless items he was treated like a god, and got his hands on so many warehouses for cheap.
Those items were all converted into mana and the resulting waste from the process was fed to the metal clams in the aquarium. The result was a new kind of clam that created pearls of a metal that was as sturdy as mithril and as good at conducting mana as gold, this metal also proved to be very easy to mold when handled with mana and would create mana veins by itself if injected with mana. The perfect metal to sit as the core skeleton of the mechs and the battle fortress. This metal was already named by Hephaestus and he called it mana alloy, however the method of creating it was a bit different, instead of the waste of metals that were magically enhanced, Hephaestus made it by placing a mana cluster in the middle of mithril and gold veins and compress the three ingredients using heat and pressure into one metal vein.
When Hephaestus came to see how Yunan made his special mana alloy, he laughed hard at the seemly primitive method, sapping the mana out of magically enhanced metals then fusing the wastes to create a powdered alloy, that would be later fed to clams to create the impurity-free mana alloy, Hephaestus was also impressed with how Yunan was using mana veins like that, it was not an innovative and flexible idea but "if it's stupid and it works, it isn't stupid".
Hephaestus then took his time to teach both Balin and Yunan a few tricks on how to handle the mana alloy just incase they messed up, this alloy was not a sustainable resource and there was no need to waste, especially since they didn't find the method of recycling the metal as of yet, he also was wondering what can they make with the metal, he created it for some reason and never had to use it again, these boys got it by accident and immediately found so many uses for it, this kind of luck can only be seen in this family.
After fully maximizing his 18000 points in each stat it was time to teach the boss a lesson, the other two parties have already defeated the boss and were working on mapping the floor for Yunan. The boss was not what Yunan expected to fight, but still it was a very interesting fight for him, and the resulting rewards were even better than he thought, he was getting a bit too lucky this floor, was Fortuna doing something she should not, he was her man, that much is true, but couldn't she hide it a bit more when she tried to help him out, there will be many gods getting angry if it was exposed.