Equinox Spirit Magic

Equinox Spirit Magic (季節精霊魔法, Kisetsu Seirei Mahō) is a recently discovered form of Spirit Summoning Magic, accidentally unlocked through the usage of Enchantment and Fairy Tail Blue Mistral#Magic on the atmosphere in order to drastically change the environment, thus drawing out spiritual entities who reacted to such a shift. Though not much is known, many scientists and mages have classified it as a form of Subspecies Magic — as it's one of the few spirit summonings that share close ties with Celestial Spirit Magic.

As the magic's name would subtly imply, the caster is able to summon the spirits of the four seasons — summer, autumn, winter, and spring. It's later discovered that such spirits are able to be conjured through a unique form of enchantment, which is taught to the user by said spirit, or through a specially-crafted medium made from the spirit's own life force. Uniquely enough, these spirits can have multiple summoners at the same time because of their overall spiritual physiology, classified as embodiments rather than spirits, thus having no true allegiance or contractual duty unlike the spirits found in other magics.

Overview
"We are the forces of nature, existing since time memorable. We hold no allegiance to one power, but follow the will of the earth itself."

- The four spirits explaining their nature to one of their summoners.



Trivia

 * This magic and its respective abilities were based on the Four Maidens from the RWBY webtoon.
 * The author states that this magic was made because of his desire to incorporate various elements found in the Elementals race, created by User:Ash9876, but putting his own spin on it so that it comes close to the representation of the seasons found in various legends and myths. It would also explain the reason why the author classifies them as "embodiments", despite their spirit status.
 * Though similar, there's no relation to this article and Aeon Spirit Magic in any way, aside from the overall theme. The same goes for Elemenian Spirit Magic.