Runewell

Runewells are ancient artifacts, remnants of the Reign of the Runelords. They were created with the use of Xin magic, a practice now mostly forgotten to time. The Runelords used the wells to concentrate magic in its raw form, condensing it into a physical form. Though extremely powerful, each Runelord had a limited access to magic and only seven types of wells were created with each reflecting the Runelord who created it.
Runewells in the modern day are mostly dormant, though the lingering power of the magic they still passively accrue attracts many a magic user in search of power. Their magic aura remains strong even now and it is still possible to reactivate them.

Availability

Since the fall of the Thassilonian Empire, knowledge of the Thassilonian ruins was gradually forgotten and with them so did the knowledge about runewells. Only few people know of runewells, fewer knowing the locations of them and fewer still knowing their purpose and how to use them.
Runewells are often at the center of odd occurences, their influence potentially as far-reaching as it is undetected. Though most are dormant, requiring an adept user to reactivate them, their lingering properties still affect the environment surrounding them with the magic they still slowly gather. This often makes it harder still to access a runewell, even with a detailed map to one.

Utility

Runewells were used by the Runelords to concentrate power for them to draw from. Some wells even being key to re-awakening the Runelords from their slumber.
However, the knowledge about this use of runewells has mostly disappeared and runewells are now used for far-less ambitious goals by less powerful magic users. Runewells nowadays vary in their use though their obvious magic aura attracts all kinds of magic users who use them in all sorts of rituals. Notably, the Endseers unknowingly use the lingering power of a runewell in the Brimstone Haruspex to awaken orc witches to the orcish unconscious.