Spirit Relic

 

Spirit Weapons are the Final Result of sealing a Spirit into a Magic Item of any kind with Seith Magic. These weapons are very dangerous and risky to use. Using these weapons is similar to both a Unison Raid and Take Over.

Usage
The user merges their magic power with that of the Spirit Weapon. By doing this they gain the abilities and magic of the spirit sealed inside. By using the weapon they can cast spells used by the spirit. This is very dangerous and risky becauseif a user is not careful the spirit can possess them. However, even if it does the spirit is still bound by the weapon unless the user willingly releases the spirit from the weapon which is impossible if the spirit possesses it's wielder due to the fact simply possessing them doesn't grant the spirit the use of their magic powers. The only exception to this rule is Ancestral Magic. Simply by knocking the weapon out of the user's hand will expel the spirit's possession from the body of the user.

Trivia

 * The idea was inspired by the Zanpakuto from bleach.