Danmachi Hulk

The main character, named Akira, enters the world of Danmachi in the body of a new kind of race with black skin, powerful physical strength resembling the Hulk, and a height of 4 meters. He finds himself captured by a sinister god who uses him as a gladiator in the arena, forcing him to fight monsters and other captives. His body emits antimagic energy, which makes him unable to be affected by magic, making him invincible against normal magical attacks. In this cruel and merciless environment, Akira loses his humanity, but in his soul he keeps memories of his life before entering this world.