One of the more fascinating implications of the facet-meta model of the arcane is the presents of wild magics in our world. These magics seem almost alien in contract to our more familiar elemental magics, however, careful analysis has shown that wild magics are in fact composed of elemental magics operating in vastly complex woven spells. The complexity of these spells is suspect to be a cause for inelegance, leading to mistakes, change, mutation and ultimately, evolution.
Recent finds at isolated chrono-distortions seems to validate this hypothesis. Evidence suggests that the common golem, backbone of many guilds, is distantly related to the wild and destructive stone elemental. While skeptics question how the spell for the creation of such an intrinsically destructive construct would suddenly become the useful worker known as the golem, the answer is that small changes to summoning glyphs would over time accumulate into what we recognize today.
These same skeptics will continue to argue that it is improbable that the random mis-copies made by summoners could amount to a more useful version of a construct, but this to can be rationally explained. When a summoner makes a mistake that causes the entity in question to be more violent, the summoned being will likely kill its summoner, thus that summoner does not live on to teach others the used glyphs, but should a summoner make a beneficial mistake then the summoner will often gleefully publish their findings to the wider public, leading to the success of more obidient summons and, over time, turning the violent stone elemental into the quiet golem.