Level Eater - Chapter 33: Good to have bear material.

After saving a dying world despite being a summoned Extra, Rey is executed by the supreme beings that exist at the top of his reality.They also slaughter his entire family and wipe out the world he sacrificed everything to protect.However, he is surprisingly reincarnated into the world of those who killed him and ruined his life. Now stuck in this higher dimension as a nameless slave, this Extra will rise up and have his revenge on those who wronged him.No one will be spared!Tags: Action. Adventure. Reincarnation. Revenge. Magic. WeaktoStrong. Romance. NoHarem. Academy. Superpowers. Transmigration. Villain.

Traveling to the world of Hokage, Kamiyo Colt witnessed the chaos of the Nine Tails firsthand.Without any special powers initially, he planned to develop quietly and survive until the Infinite Tsukuyomi. However, when he first trained his Chakra, his system finally activated.The system's rules were simple:By healing others, he could gain random attributes and skills.“Heal Uzumaki Naruto to receive pure Ashura Chakra!”“Heal Uchiha Shisui to gain his bloodline talent!”“Heal Sasuke Uchiha to obtain pure Indra Chakra!”In this way, Colt steadily developed his abilities over more than ten years.During the Fourth Ninja World War, when the ninja coalition saw him suddenly knock out the Six Paths Madara with a single punch, he looked innocently back at them.“What? I'm a medical ninja. Doesn't it make sense to defeat him with one punch?”

Collection of short stories.

- Description from Novelupdates

In a world where reality shifts with every roll of the dice, a man daily partakes in an extraordinary game with the gods, his actions dictated by his decisions and the face of the dice. He takes great joy in this game until the tables turn, and he himself becomes a piece on the game board. Now, the dice are in his hands, and it’s his turn to shape his own destiny. It’s time for the Snowman to play his part.