According to Etzali, the ability allows someone to have a face or body similar to others, though it is apparently impossible to change in a genetic level. It is probably similar to Aztec's magic, which uses the flaying of skin to use a disguise.
Toaru Kagaku no Railgun
Level Upper Arc
- Main article: Level Upper Arc
Toaru Majutsu no Index
Three Stories Arc
- Main article: Three Stories Arc
Etzali first mentions the ability to make Kamijou Touma believe the real Unabara Mitsuki was an imposter using this power to mimick him. Later, after his true identity is exposed, he adds that his power isn't Metamorphose but similar to it, cluing Touma into the fact that he is a Magician.
Kazakiri Hyouka Arc
- Main article: Kazakiri Hyouka Arc
When answering Kamijou Touma's question about what esper ability could cause Kazakiri Hyouka's condition and strange body, Tsukuyomi Komoe mentions espers with the Metamorphose power as one possible explanations, but shoots down Touma's conclusion that Hyouka is such an esper, as she isn't any of the only three espers possessing it.
Shinyaku Toaru Majutsu no Index
- Main article: Kamijou Arc
- Toaru Majutsu no Index Light Novel Volume 05 Chapter 2 Part 14
- Toaru Majutsu no Index Light Novel Volume 06 Chapter 3 Part 3
- Toaru Kagaku no Railgun Manga Chapter 014
- Shinyaku Toaru Majutsu no Index Light Novel Volume 22 Reverse Chapter 2 Part 8