The Steel Golem is a creature constructed by wizards with steel and sentience magic. Steel Golems are as durable as their name entails, if not more so due to the incredibly amount of layers and resistance within their inner bodies - if designed by one of great care. They typically do not have the brightest minds, but will serve their creators or whoever can gain sway over their minds with the utmost loyalty.
The process of creating a golem is rather simple, in general: take a pile of the same element (various kinds can be used for experienced wizards) and grant it consciousness. Now, the actual spells for this assembly are far more complex and not something any novice should even try - lest they succeed in the assembly, but fail in the submission. Indeed, a golem that is given consciousness and free will, most likely, will try to attack its creator, finding the wizard a threat. However, those who have experience in shaping the wills of others or constructing arcane constructs will have no difficulty with such a task.
For Steel Golems, they can be equated to Gears, as their mechanical parts and animatronic nature is quite similar, but bigger, and everything is moved with the assistance of magic rather than strictly cogs and engineering.
Currently, Valicia is in possession of Three such Steel Golems, gifted to them by the Lady Morganna. These golems have a steel outer shell, a layer of insulation and crisscross structure - to aid against blunt damage - and then another layer of steel that protects the pistons inside the limbs and joints - these joints and limbs are further protected by steel pauldrons and safety guards. They have been instructed to serve and protect Valicia with their artificial life - but ultimately bow to the sorceress atop her fungal tower.
STATS (Each one depends on the construct, these are of the ones that protect Valicia):