MTL - Konoha: Naruto Taught By Aizen - Chapter 268 post-war repairs

Zane Thaleward, born into a prestigious family known for their extraordinary magical abilities, struggles to meet the expectations placed upon him. Unlike his relatives, his magic is weak, limited to only the simplest of spells, making him the subject of mockery and ridicule.Despite the constant criticism, he remains determined to become stronger. One day, while searching the family’s library for a way to improve his magic, he stumbles upon a strange, ancient book. Little does he know, this discovery will change his destiny forever.

“Gu Hangshen! Your sister stole my man, and you helped her do it! Your whole family is rotten!”“Whatever my sister owes you, I'll compensate you.”“And what will you compensate me with?”“Me.”“...”Later, he not only gave himself up as compensation, but he also came with a clingy little bundle of joy...

A man is reborn into the world of Avatar: The Last Air Bender as a waterbender from Katara's tribe. Best of all, he was the same age as her, and he had a system with him to help.He knows the future and a system that lets him continuously get stronger by completing quests or long-term missions, as well as giving him the ability to copy abilities from others for himself. He will become invincible in the world of Avatar, even more so than the Avatar himself.