I got it, You got it, We got the magic, Yeah
After the apocalyptical Because Owners can no longer amass the power they once held, Remnant power is dispersed to the point where the two species are reliant on each other. An Owner can draw power from a Remnant to bolster their own or to feed into a large, continuous working. They can also restore power to a Remnant, if the Owner has enough power to do so. Remnants can also pass power to other Remnants, but without an Owner's intervention they cannot full restore themselves if half (or more) of their reserves are spent. On the surface of Suborian they are scattered broadly, with 2-4 Remnants seeded in each community at the beginning. They live as part of the extant village populations. Surface communities under typical Owners include a number of other peoples, such as Serpentians, though the forms and abilities that these others take are also greatly altered by the aftermath of the apocalypse. Encouraging births of subsequent generations of Remnants became a priority for the surface villages and cities, in order to increase the available pools of magic and maintain a steady, readily available supply. Unfortunately, each subsequent generation is slightly weaker than the last, dispersing the magic even further.the world of Suborian was reborn, and with it, a species of peoples made of a myriad atoms of those who came before. Remnants were created by the Overlords to provide a source of emergency replenishment for Owners who were given domain over their communities. They are human-like and capable of storing and lightly using magic.
Eventually, it is probable that surface-born Remnants will lose their ability to produce magic completely.