Extinguishers are Lovecraftian cosmic entities which inhabit the magic universe, and feast on a particular type of Aetheron known as the Sparks, which absorbs magical energy from surrounding particles and converts them to Lumons, Wakhan's version of Photons. Depleted Aetherons contain less energy than charged Aetherons, and thus are pushed away more rapidly by radiated Lumons, allowing fresh Aetherons to charge the Sparks. This is the way in which stars are formedi n Wakhan. Sparks have an extremely high intrinsic concentration of magical energy, which allow Extinguishers to power themselves.

Extinguishers can be anywhere from moon or planetary scale, all the way to multiple astronomical units in size. Their appearance mimics that of a nebula, except their actual bodies are shrouded in complete darkness, and the nebula-light apparatus around them being the infalling stars and cosmic dust clouds containing Lumons. Being bound by magical energy, the entity can transmit information instantly between all parts of its body, allowing its size to grow ubounded.

To someone in Yokea, they might imagine it in some ways like a living black hole, marauding through the universe consuming energy to grow itself. Like a black hole, no one who has ventured into the path of one such entity has ever managed to escape with information about its interior.