Naruto: I Was Summoned to the Ninja World by Tsunade

He was accidentally summoned to the ninja world by Tsunade using necromancy. Xia Fan originally wanted to follow Uncle Snake and follow an unbeatable path of scientific research. However, he is really talented and has the qualifications to become an immortal, so he is attracted by the living beast. Sorry, Uncle Snake, you can go play by yourself. Since then, there has been a legend in the ninja world. That's what he's called along with Mr. Living Snake. Lord Xia Fan of Shigu Forest.