The Eternal Supreme is a Manga in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on theeternalsupreme.com fastest updating comic site. The Summary is

What happens when a former martial emperor gets reborn into a complete loser’s body? Scott Dillon, a legendary martial artist who was ranked third-strongest in the continent, finds himself in this predicament when he wakes up in the body of 15-year-old Kerwin Walton.

Kerwin was once a failure who had yet to open a single chakra portal in his body, but now he’s morphed into a genius martial artist overnight and becomes the talk (and target) of the town. Armed with the expertise of his former life, Kerwin is on a mission to complete the ultimate incantation that killed him in the first place – all while wiping the floor with his former bullies at school. Will Kerwin be able to exceed the accomplishments of his previous life? One thing’s for certain: no one will ever call Kerwin a loser again!