Kill Skill. Killing an enemy gives +0.3% Weapon Swap speed per Bloodlust stack per level. Dealing damage to an enemy adds a stack of Bloodlust. Stacks decay after a few seconds if you haven't dealt damage.
+0.5% Magazine Size per Bloodlust stack per level. Dealing damage to an enemy adds a stack of Bloodlust. Stacks decay after a few seconds if you haven't dealt damage.
Kill Skill. Killing an enemy with a bullet gives +0.5% Melee Damage and -0.005s Grenade Fuse Time per Bloodlust stack per level for a short time.
+0.1% damage reduction during Buzz Axe Rampage per Bloodlust stack per level. +10 Bloodlust stacks per kill (+5 per level) during Buzz Axe Rampage.
Kill Skill. Killing an enemy with a grenade or explosion gives +0.5% weapon damage per Bloodlust stack per level for a short time. Enemies killed this way have a 15% chance per level of dropping Grenade ammunition.
When thrown, your buzz axe now has Dynamite attached to it which explodes on impact.
Kill Skill. Killing an enemy with a melee attack gives +0.2% Grenade Damage per Bloodlust stack per level for a short time and adds +2 Bloodlust stacks per level.
Increases the duration of Buzz Axe Rampage by 0.05 seconds per Bloodlust stack (at time of activation) per level.
Kill Skill. Killing an enemy gives +0.3% Reload Speed per Bloodlust stack per level for a short time.
+7%, +15% burn damage per level. 7% chance (+7% per level) per fire attack to set self on fire.
Kill Skill. 7% chance (+7% per level) per fire attack to set self on fire. Killing an enemy gives +40% Elemental Effect Chance (+40% per level) for a short time.
+5%, +10% Weapon and Melee Damage per level (except for Sniper Rifles). -5% Critical Hit Damage (-5% per level)
When Elemental Status Effect Damage is being done to enemies you gain stacks of Elemental Elation up to a maximum of 20. Each stack gives +1.0% Fire Rate and Magazine Size per level. Stacks will not decay while you are on fire.
All Elemental Status Effects you cause have a chance to light yourself on fire. Ignite chances are determined by those accumulated from Burn, Baby, Burn and Fuel the Fire.
Melee Attacks have a 10% per level chance to Ignite enemies. +10% Weapon Accuracy and +7% Reload Speed when on fire.
Melee Override Skill. Pressing Melee causes you to breathe fire in a cone in front of you. Cooldown is 15 seconds.
+20% Burn Duration on you per level. 15% chance per level for your Burn effects to apply another Burn effect.
A percentage (5% per level) of Elemental Status Effect Damage done to enemies heals you.
+4% Melee Damage per level; additional +10% per level when shields or magazine is empty.
+20% Buzz Axe Rampage cooldown from taking damage per level; additional +20% per level from Health damage. You can now be damaged by teammates; friendly fire damage is 50% - 5% per level.
+7% Fire Rate per level when shields are down. +1 sec Shield Recharge Delay per level.
Up to 10% per level of overkill damage (damage that is over and above what was needed to kill the enemy) is returned to you as Health, depending on how low your health is.
Fight For Your Life is replaced with Light the Fuse. During Light the Fuse you pull out a live bundle of dynamite and can move normally. The bundle detonates when the timer runs out. If you kill someone you are revived. Getting a revive with the bundle explosion gives you bonus Movement Speed for the remainder of the time that was left in Light the Fuse. Throw Dynamite sticks with Fire. Detonate bundle by holding the reload button.
You can instantly Revive teammates at the cost of downing yourself. You may revive in this way only once each time Buzz axe Rampage is on cooldown. +50% Fight For Your Life time.
Taking damage from an enemy while your shield is down adds a stack of Salt the Wound to a maximum of 20. +1.5% Melee Damage and +1% Shotgun damage per stack per level.
Activating the Buzz Axe Rampage when at or below 33% of your max health remaining (i.e., when the ! is showing) instantly refills your health and transforms you into a Badass Psycho Mutant with +100% Melee Damage and +50% Damage Reduction. Buzz Axe Rampage is instantly recharged afterwards.