It suppresses the sensation of pain and fear, allowing the wearer to exert 100% of their physical potential.
The armor does not technically grant new powers; instead, it removes the user's subconscious physical limiters. Berserk - Berserker Armor
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. It suppresses the sensation of pain and fear,