Pretty cool Bronze Colossus. Although I always imagined them as bieng more statue-like and less of a mecha.
Seriously though, it looks like ancient dwarves might have designed that thing.
The bronze colossus is most likely to have been designed by dwarves, the story goes like this:
The great ancient dwarvern race, the smartest creatures that were to ever exist. After a long period of hardship they have driven the HFS underground and sealed them in. they relax and have a major baby boom. The artisans finally have creative freedom, so they decide to build a giant complex megaproject to display their intellect -a giant invincible colossus. after it is finished the entire race gathers to celebrate with alcohol made from every plant known to dwarf, they are modest drinkers, but it is a special occasion. One dwarf, a cheap drunk, stumbles into the activation lever. The colossus activates prematurely and disconnects from the magma pump before fully filled. in the confusion a splash of magma spills before the floodgate closes, landing on the booze supply. The colossus' nascent mind likens the flaming chaos to the concept of 'the pit' as the dwarfs compiled a basic cognitive memory for the colossus before the accident. every older dwarf burns to death, the young are left squabbling in the ashes, brains -damaged by the blast, future -no longer guided with wisdom, their only early memories -alcohol soaked. noticing that he is not fully powered and therefore not invincible, the colossus attempts to pull the lever to finish the process, his giant hands only succeed in breaking it. This pushes his mind over the brink, reverting to a paranoid point of view that any technologically advanced civ must be crushed before it threatens him, so he eternally roams the land in search of enlightened races, destroying their constructions so he can forge his own invincibility...
He would come back centuries later to find the dwarves overall incompetence disturbing, their basic grasp of engineering derived from the few writings that weren't destroyed in the fire. He would rather the dwarvern race be extinguished than this foul bastardization.
*phew*