Immortal Night

Immortal Night (不滅の夜, Fumetsu no Yoru) is a forbidden Caster Magic that is used by Dalv Kushizashi.

Effect
As the name suggests this magic, all but, makes the caster immortal. No matter how mutilated or destroyed the caster's body becomes, their magical energy will activate this magic and regenerate their body. When being regenerated, the caster's body either becomes a shadowy mass or as swirling ash.

This magic is only effective at night, being most powerful during a full moon and at its weakest during a new moon. Regardless of the phase of the moon, the caster will still be revived, it just takes longer the more the moon wans.

It is unknown who originally created this magic, but it is believed that vampires had something to do with it.

Drawbacks
In order to properly use this magic, the caster MUST have a high tolerance for pain AND high levels of magic. If the user doesn't have a high tolerance for pain, then they won't be able to handle the magic properly and if the caster doesn't have high levels of magic, then they won't be able to even use the magic.

Other than the requirements to use this magic, there are two major drawbacks. The first major drawback is that for every time the user is revived with this magic they won't be able to move for twelve hours (times the number of times they were revived). The second major drawback is that this magic ONLY works at night. Once the sun rises the twelve hours that the caster is rendered immobile begins, making them extremely vulnerable during the day.

Trivia

 * Immortal Night is based off of Alucard's immortality in Hellsing