Spell Furnaces (術炉, Justsu-ro) or Spell Reactors, were catalysts developed by the Elves near the end of the Great War, built to hold a single Phantasma Core each, on which Elven Mages would deploy the Áka Si Anse rite to rewrite its binding magic and direct the destructive power towards enemy forces.
The protective properties of the Spells Furnaces would protect the "Elven homeland" from the destruction wrought from the effects of the Aká Si Anse.
History[]
The prototype of the Spell Furnace The Proof of Concept Reactor (理論検証試験炉, Riron kenshō shiken-ro) was created by the organisation Akasha, being the goal behind the "Akasha Hollowification Project" held in Akasha HQ directly below Kainath's Sanctuary