Arifureta Shokugyou De Sekai Saikyou Episode 1 -

His hair turns white, and his muscles become lean and powerful.

Hajime Nagumo is a mundane high schooler living a nightmare: his entire class has been summoned to the fantasy world of Tortus as heroes, while he is gifted with the useless "Synergist" class. While his peers gain flashy combat skills, he can only transmute materials like a glorified blacksmith. The Betrayal Arifureta Shokugyou de Sekai Saikyou Episode 1

The class enters the Great Orcus Labyrinth for training. When a powerful Behemoth is accidentally summoned, the students panic. Hajime uses his transmutation skills to hold the bridge, allowing his classmates to escape. As he prepares to retreat, a malicious "friendly fire" fireball from one of his own classmates sends him plummeting into the lightless abyss of the dungeon’s lower floors. The Bottom of the Abyss His hair turns white, and his muscles become

Hajime survives the fall but loses his left arm to a monstrous Twin-Headed Wolf. Broken and bleeding, he hides in a small crevice, walled off by his transmutation. The physical pain is eclipsed by a psychological snap; the "kind" Hajime dies in that hole. He realizes that in this world, "efficiency" is the only morality and "strength" is the only law. The Transformation The Betrayal The class enters the Great Orcus