Spirit magic is a rare form of magic that allows the user to summon an elemental spirit to aid them. These spirits bond with and serve individual mages who have the same magic attribute as them. Each spirit possesses immense magic power and can increase their host's own magic power and spells. In order to use this magic to its full potential, specific spells are required, which are stored within grimoires.
Spirits develop over time with their hosts, but it is not known to what extent spirits can evolve. Because of this connection, the spirit's body will start to crumble away if their host is on the verge of death. This process can be reversed if the host is revived in time. If the spirit is removed or their host dies, the spirit can leave and seek out a new worthy host. The spirit is also not forced to return if their previous host is revived. Alternatively, a spirit can be passed down through a line of inheritors, such as the case with the Heart Kingdom's queens and princesses.
When a spirit and its host achieve near 100% resonance with each other, the spirit host is able to achieve a level known as Saint Stage, which allows them to generate magic that can purify malice and destroy devils. However, it can only be achieved if the host is an attack-type mage.
- Sylphs, salamanders, and undines are mythological spirits attributed to the classical elements by Paracelsus.