Berserk - Berserker Armor -

It suppresses the sensation of pain and fear, allowing the wearer to exert 100% of their physical potential.

Instead of healing, the armor brutally "fixes" injuries by injecting thin metal spikes into the wearer's flesh to pin broken bones and joints back together, allowing them to continue fighting until their body completely fails. Berserk - Berserker Armor

The armor is described as a "villainous item" because it eventually consumes its wearer. Berserker Armor | The Evil Wiki | Fandom It suppresses the sensation of pain and fear,

The armor does not technically grant new powers; instead, it removes the user's subconscious physical limiters. Berserk - Berserker Armor