Unarmed is a combat skill that will give players various combat bonuses when using their fists as a weapon.
Experience in Unarmed is achieved bases on how much damage you do to a mob or player when unarmed.
While having nothing equipped, the 'use' action (right-click by default) will activate your Berserk ability.
Berserk makes your unarmed hits do 50% more damage and increases your mining speed on weak blocks.
The ability lasts for a duration based on the Unarmed skill level.
Iron Arm Style
Iron Arm Style adds extra damage to your normal hits while using your Fist. The base damage for Iron Arm Style is +4 DMG and grows larger the more levels a player gains.
Arrow deflect has a chance to deflect arrows shot at you. The passive ability allows arrows shot by mobs and players to harmlessly fall to the ground.
Disarm is a passive ability that allows a player to force a player to drop the item currently equipped.
Iron Grip is a passive ability that counters Disarm. Iron Grip prevents you from being disarmed and increases as your disarm increases.