Universal Matter Deficit

Essential physics includes the law that matter can neither be created nor destroyed. however, magic often appears to break these rules, especially concepts such as a Philosopher's Stone, which multiplies energy itself, seemingly drawing on an endless supply of energy. The universe in reality contains a fail-safe for just this reason, to avoid spatial paradoxes.

If magic is cast that would use matter or energy that is not physically present, such as a Philosopher's Stone, a grimoire, or an item such as the Archon's Blessing, it will access a specialized demiplane that exists outside of time and space. This pocket dimension is known as "Limbo", and also stores deceased souls until the next planar cycle. All physical matter aside from the souls of the dead is made of a substance called Omnium, which is comprised of every single possible variation of energy. This substance is essential to the planar cycle, as the "Universe Egg" is comprised of this material. (See The Planar Grid Theory for more information)

When a deficit of energy or matter is detected, Limbo will immediately release a proportionate amount of matter back into reality in order to balance this out. This, however, sometimes releases slightly too much energy into the main plane, resulting in a small amount of radiation being released into the atmosphere where the object was created. This is more likely with Elementals, such as the Guardians, due to their powers being natural.