is a Japanese light novel series written by Arata Shiraishi and illustrated by Denim Uo. It was originally published as a web novel on the online publication platform Shà Âsetsuka ni Narà  in 2018, before Kadokawa Shoten began publishing it as a light novel under their Kadokawa Sneaker Bunko imprint; eight volumes were published between October 2019 and March 2022. A manga adaptation illustrated by Kentarà  began serialization on Square Enix's Manga Up! service in September 2019; its chapters have been compiled into eight volumes as of June 2025. An anime television series adaptation produced by EMT Squared is set to premiere in July 2026.
Ephtal, a magician who is actually the reincarnation of a human from the modern world, spent his entire life trying to improve his skills in magic. However, he was unable to succeed before dying of old age. After his death, he is reincarnated 400 years later, also as a sage named Ephtal. Now finding himself in a world where, due to magic becoming weaker, he is now the strongest magic user, Ephtal decides to live out his second chance and fulfill what he was unable to do in his previous life.
Arata Shiraishi originally began publishing the series as a web novel on the online publication platform Shà Âsetsuka ni Narà  in 2018. Following positive reception, the series was picked up for publication by Kadokawa, which began publishing it as a light novel under their Kadokawa Sneaker Bunko imprint; the light novels feature illustrations by Denim Uo. After publication, the web novel and Shiraishi's account were deleted from the website. Eight volumes were published between October 1, 2019, and March 1, 2022.
A manga adaptation illustrated by Kentarà  began serialization on Square Enix's Manga Up! service on September 26, 2019, under the title . The first volume was released on January 31, 2020; eight volumes have been released as of June 6, 2025. The manga is released in English on Manga Up! and is also licensed in English by Comikey.
An anime television series adaptation was announced on February 20, 2026. The series will be produced by EMT Squared and directed by Hisashi Ishii, with Deko Akao supervising series scripts, Hideki Furukawa designing the characters, and Takaaki Nakahashi composing the music. It is set to premiere in July 2026 on Tokyo MX and other networks.