The Berserker Armour, which the dwarf blacksmith Hanarr forged at an unknown point in time in Berserk, is possibly Guts' most lethal item. The armor was first seen during the conflict at the Spirit Tree Mansion and has been imbued with a dark, violent od, which is the life force of all creatures existing in the Berserk realm.
According to the plot, the wearer's negative emotions cause the armor to substantially increase their speed, strength, and fighting prowess to almost superhuman levels. Due to their superhuman power and ferocity in battle, those who wear it are sometimes referred to as "berserkers." The armor then effectively numbs the wearer's perception of pain or terror.
Why is the Berserker armor so strong?
While each of these features of the armor's construction can turn its wearers into fierce fighters capable of facing off against even the highest-ranking Apostles, they are all fatally expensive. With the help of this armor, Guts had avoided death several times in Berserk, but each time the cost was higher.
To put it simply, the armor takes away the wearer's need for self-preservation. Movements that are beyond human capabilities are made possible by the removal of subconscious physical and mental restrictions that are present in the human body. Wearers are persuaded to adopt an irrational fighting style in which they attack without consideration for their own security or well-being.
Its full power set can be expected to be seen in the last installment of the franchise, where fans can witness how no typical person can move the way Guts did. Immediately after donning the armor, he swung a blade as huge as the Dragon Slayer, according to Grunbeld. Because of Guts' might, the Great Flame Dragon Knight had to switch into his Apostle form to engage him in combat. Guts initially battled Grunbeld, but after donning armour, he easily defeated the Apostle.
Strong hints have been made before Guts' appearance that the Skull Knight was the last person to don the armor. This would work out rather well since it was strongly hinted that its prior user struggled until they died from numerous severe wounds. The Skull Knight has somewhat corroborated this.
In the canonical story of Berserk, he gave it to his friend Flora, who lived in the Spirit Tree Mansion and kept it there until Guts received it during his fight with Grunbeld and Zodd. The armor demonstrated the capacity to summon the "blood memories" of its previous wearers on Skellig Island. As such, Guts was instantly transported to a previous Eclipse with a different iteration of the God Hand when the armor he was wearing at the time was struck by the blacksmith Hanarr.
The wearer's violent emotions can physically appear in the armor, which also moulds the helm to mirror them. When Guts gives in to the anger of the armor, the helm assumes the appearance of the Beast of Darkness, and he occasionally even bites enemies. When Guts regains control, the lower half of his face and his real eyes are exposed.
In this stage of the story, with the armor blending more with the wearer, it totally covers Guts' skull and has glaring red eye sockets. The user's body can be strengthened against almost any injury by the armour, which can regenerate itself when damaged. It is no wonder to see a dark and gritty series having such a unique and ominous armor that manifests its strange form of power.
However, even this powerful armour is not enough to give Guts an edge over his archnemesis, who has rightfully taken his place as one of the most intriguing antagonists in the media. As the manipulative Machiavelli of this dark world, Griffitth can use his tactics, superior intellect, and physical abilities to overcome Guts no matter how much the Berserker armor boosts his power. At this point, the best Guts can do is fight the latter's powerful generals.