MTL - I am a Big Villain - Chapter 266 Marie Su's Men 1

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

Xuanyuan was reborn into a strange new world where training to be a Xian was a cornerstone. There was however something ancient dwelling inside his body. He could now devour all of creation…

He loved her. She left him for someone richer.But that night, something awakened in Nishanth — a system with no fame boosts, no fantasy powers, and no second chances.Just money. Assets. Ownership.The Infinity Spend Protocol doesn't make him a hero. It makes him a Spend King — a silent force who crushes rivals, empowers the poor, and stuns the nation with outrageous moves.From the slums of Warangal to the boardrooms of Mumbai, Nishanth spends to dominate — buying failed properties, funding orphan tech labs, and humiliating those who once laughed at him.And when the world finally asks:“Who is behind all this?”He walks on stage and answers,“The boy you forgot. The man who never forgot you.”Spend. Dominate. Rise.This is the rise of India’s Spend King — a man who never needed fame.........Only the fire of betrayal.

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.