Real Double

is a Mirror Magic spell.

Description
With an open grimoire, the user manifests a mirror in front of them and then creates a clone of themselves, which has inverted outer features because it is the mirrored version of the user.

The clone then could assist the user in a fight, because it is capable of using the same spells as the original. Thus, the user is able to launch an enhanced attack, which has twice the power of the original attack.