Qati, The Ethereal Plane, The Plane of Magic.
The Ethereal Plane, also known as Qadmon, is a plane of extraplanar travel and boundless space and the source of all arcane Concerning Magic. The Ethereal Plane touches every plane in existence, from the Material Plane to the Elemental Planes and the Outer Planes of the domains of the Celestials. Though Qati and the Ethereal Plane are one and the same, scholars refer to the plane as Qadmon to differentiate the two. Qadmon contains both the Tree of Magic and the Tree of Witchcraft, the Sfirot and the Qlifot, respectively. The Sfirot represents white magic, typically seen as noble and virtuous, while the Qlifot represents black magic, utilized by those wishing to circumvent the typical restrictions placed on Arcane magics, which might result in more powerful sorcery, albeit with its own drawbacks, including being more dangerous and less sustainable.
Each sphere of both the Sfirot and Qlifot is, itself, living and can take on a physical form, though it does so very sparingly. Each sphere is more commonly looked over by a Grace for the Sfirot, each of which leads an order of Qareen, and Fury for the Qlifot, each of which lead an order of Aberrations.