Battle Rage has a max cap of 200. Battle Rage's regeneration starts out slower than Energy but faster than Creation. As the player levels up in Butchery, the regeneration speed increases. The speed increase per level up:
Snow Chargers will drain the player's Battle Rage upon attacking the player.
Battle Rage allows the player to do critical hits with their melee attacks- on top of the critical hits the player can already do in vanilla Minecraft. Battle Rage will not have a chance to activate until the current value is at 51 or higher. Once Battle Rage reaches that threshold, attacking a mob with a melee attack has a CurrentBattleRageNumber/200 chance for a critical hit to occur. E.G. the player has a 50% chance to deal a critical hit per attack when Battle Rage is at 100/200. The amount of extra damage done depends on the player's current Butchery level:
Additionally, once Battle Rage reaches a value of 180 or higher, the next critical hit will deal 30% more damage- regardless of the player's current Butchery level. This additional boost is applied after the initial increase to damage from Battle Rage. Once a critical hit is performed, the bar resets to 0 and has a cooldown of 6 seconds before it starts regenerating again.
Battle Rage serves as a partial replacement to Calefaction.