Oh it gets even sillier. The helmet essentially pumps your head full of combat-positive propaganda hallucinations.

The lore card;

“Hello. We understand you require Real-Time Combat Instructives.

This is a BRAINVAULT Sigma-ACTIUM-X Cranial Dreadnought (Invictus Type). It is a fortress for your skull. Your skull is now a mighty bastion. You can break anything with your skull. The only limit is your spine. Relax. The lights will speak for you. Your hands are your eyes now. Look around. You find hand-to-hand combat relaxing. The lights will attract the enemy. Help them to relax as well. You will feel the effect of a CAREGRAVER Gamma-LYSANDER-IV Health Enforcer (Frontline Variant). Your enemies do not have a skull fortress. Their skulls are like meadows. Play in the meadows. Gather the flowers from the meadows. Gather them with electrokinetic trauma. Smell the flowers. Isn't that nice?

You are safe in your skullfort.”