|Light Novel||Volume 2, Chapter 3|
Self Illusion (セルフ・イリュージョン, Serufu Iryūjon) is a Black Magic spell that allows the user to assume the form of another entity.
Self Illusion allows the user to appear to have transformed into a desired entity through light manipulation. Unlike Self Polymorph, Self Illusion does not physically change its user's form. Instead, it only creates the illusion that the user has transformed and does not grant the user any of the abilities associated with their new form. As such, for example, if the user uses Self Illusion to assume the form of a bird, the user will not gain the ability to fly despite appearing to be a bird.
The conjured illusion reflects the user's mental image of the desired form, so Self Illusion's level of success in producing a faithful illusion is dependent on the level of detail of the user's mental image.
Self Illusion can be cast with the three-phrase chant "Behold / my phantasmagoria, / enacted by myself." (《刮目せよ・我が幻想の戯曲・演者は我なり》, Katsumoku seyo / waga gensō no gikyoku / enja wa ware nari).
In the anime adaptation, Glenn Radars casts Self Illusion through the four-phrase chant "Behold / my phantasmagoria, / enacted by myself. / I shan't sing with another's voice" (《刮目せよ・我が幻想の戯曲・演者は我・我は彼の声で歌わん》, Katsumoku seyo / waga gensō no gikyoku / enja wa ware / ware wa kano koe de utawan).
- Self Illusion's chant does not appear in the volume of the light novel in which it debuted.