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★ 12 active SHiFT Codes as of December 4, 2025
☆ Black Market Location
★ Elemental Weakness Chart
☆ Legendary Weapons
★ Builds: Vex | Amon | Rafa | Harlowe

The Onslaughter Amon build stacks gun and fire damage, with continuous burning status effects to make farming bosses easy for Amon in Borderlands 4. See the best build, skills, weapons, and gear to use for Onslaughter Amon, along with the best skill tree abilities and character playstyle.
| All Amon Guides | ||
|---|---|---|
| Best Builds | Cosmetics | Skill Trees and Voice Actor |
| Leveling Build | Boss Farm Build | Melee Build |
| Crucible Build | ||
List of Contents
| Strengths | Weaknesses | ||||
|---|---|---|---|---|---|
|
✔︎High Single Target DPS ✔︎Extremely simple playstyle ✔︎High Incendiary damage |
✖︎Locked to Incendiary Guns ✖︎Relies on active skill ✖︎Weaker against Shield and Armor |
The Onslaughter Fire Amon Build capitalizes on Amon's Calamity Skill Tree to buff his Incendiary and Gun damage. With Onslaughter Active, you simply need to aim at the boss and keep firing to melt down its HP quickly.
Due to this build's focus on Incendiary weapons, this means that you are effectively locked into using Incendiary weapons only, since other elements will not receive the same damage buffs from your skills. While you deal large amounts of burn damage against enemies, it also means that you have lower damage against Shields and Armor due to elemental affinities.
| Skill Tree | Calamity |
|---|---|
| Action Skill: Onslaughter | |
The Onslaughter build uses the Calamity tree to stack incendiary damage, gun damage, and status effect boosts, massively increasing your fire weapon DPS. Activating the Onslaughter Action Skill also grants shield regeneration for survivability and bonus fire damage, often giving you enough burst to wipe out a boss in a single activation.
| |||
| Skill Tree | Priority Skills | ||
|---|---|---|---|
Calamity | What Burns Within Amon gains increased Incendiary Damage. Wield the Storm Amon gains increased Status Effect Damage and Status Effect Duration. Bullet Storm Whenever Amon applies a Status Effect, he gains increased Gun Damage for a Duration. This effect can stack. Burning Ramparts Amon gains increased Fire Rate and Status Effect Chance the more full his Shields. Maiming Strike Gun Critical Hits have a chance to apply Weakness to enemies for a Duration. Weakened enemies deal reduced Damage, and take increased Damage. Weakness is affected by Status Effect Duration, and is itself considered a Status Effect. Catastrophe Whenever Amon applies Shock to an enemy, he gains increased Critical Hit Chance for a Duration. Whenever Amon applies Burning to an enemy, he gains increased Critical Hit Damage for a Duration. Both effects stack separately. Dragon's Breath Whenever Amon Activates his Ordnance, his next Gun Shot is converted to Incendiary Damage, Staggering damaged enemies, and gaining increased Damage Dealt. Bosses cannot be Staggered, and Badasses have a chance to be Staggered. Crackling Aegis Amon gains increased Status Effect Damage and Ordnance Damage based on his Shields. The fuller his Shield, the greater the effect. Electrical Fire Whenever Amon Burns an enemy, he also Shocks them. Whenever Amon Shocks an enemy, he also Burns them. | ||
| |||
| Skill Tree | Priority Skills | ||
|---|---|---|---|
Vengeance | Wrath of Nature Amon gains increased Status Effect Application Chance and Cryo Effectiveness. This effect is Doubled when his Action Skill is active. Scorched Kairos Amon gains increased Ordnance Damage and Magazine Size. The Thrill (Amon) Amon gains Missing Health Regeneration. Every time Amon takes or absorbs Non-Status Effect Damage, he gains a Stack of Resolute for a Duration, which increases this effect. Battleborn Amon gains increased Gun Damage the more Full his Health. This effect is Doubled while Amon is at Maximum Health. | ||
The best skills for the Onslaughter build in the Calamity tree enhance status effects while stacking direct boosts to Gun and Incendiary damage.
From the Vengeance tree, prioritize The Thrill early for consistent health regeneration.
From Levels 1~35, focus on stacking points into gun, incendiary, and status effect passives, rushing toward the third Calamity branch to unlock its Augment and Capstone. With these passives in place, you can start effectively soloing bosses for farming.
From Level 36 onward, invest in the Vengeance tree to improve survivability while further boosting DPS through enhanced status effects, magazine size, and gun damage.
Fulminating Fist
|
||
| Tree |
Calamity
(Branch 3) |
|
|---|---|---|
| Effect | ||
| Amon gains increased Status Effect Chance while Onslaughter is active. Pressing Action Skill launches a concentrated Lightning Wave that deals Shock Melee Attack Damage to enemies it passes through. | ||
Pick up Fulminating Fist to increase Status Effect Chance while Onslaughter is active, enabling more elemental procs for significant damage-over-time. It also converts the fist into a ranged lightning attack, making it useful against shielded enemies.
Stormcutter
|
||
| Tree |
Calamity
(Branch 3) |
|
|---|---|---|
| Effect | ||
| Molten Slam is now Stormcutter. Press and hold Action Skill to swing a Massive Forgesword, launching a Forgewave that deals Shock Melee Damage to all enemies it passes through. Restore Action Skill Cooldown, Action Skill Duration, and Ordnance Cooldown for each enemy hit. | ||
Stormcutter is a great tool for cutting through boss and enemy armor while also reducing Onslaughter’s cooldown or extending its duration if already active.
| Specialization | Tree and Effect |
|---|---|
Riddle You This
|
Whenever the Vault Hunter deals Gun Damage, gain a Stack of Riddle You This, increasing Gun Damage. Stacks are lost if a new Stack has not been gained for a Duration. Gun Damage: +1% per Stack Maximum Stacks: 50 Duration: 6 seconds |
Groundbreaker
|
Non-Melee Attack Damage and Slam Damage are Stored. Melee Attacks and Slam deal Bonus Kinetic Melee Damage based on Stored Damage, and consume it. Stored Damage: 20% Stored Damage Duration: 5 seconds |
Now With Caffeine
|
Reduce Action Skill Cooldown whenever a Repkit is activated. Action Skill Cooldown Reduction: 25% |
I Am A Gun
|
Action Skill Damage now benefits from increases to Gun Damage. Action Skill Damage: 50% of increases to Gun Damage. |
These specializations give a significant damage boost to both your melee and gun damage.
| Jump to a Section! | |||||
|---|---|---|---|---|---|
| Weapons | Repkit | Ordnance | |||
| Class Mod | Shield | Enhancement | |||
| Firmware Sets | |||||
| Legendary | Gun Overview |
|---|---|
| Hellfire |
Type: SMG Manufacturer: Ripper Burning Desire Ripper - This Gun charges before Full Auto firing |
The Hellfire SMG is the absolute best weapon to use when using the Onslaughter Fire Amon build. Its high rate of fire and legendary passive that shoots Incendiary rounds synergizes extremely well with all of Amon's Calamity skills that buff Incendiary damage.
Ripper guns that apply fire status effects are excellent for this build, offering a rapid rate of fire after a short spin-up that melts through enemies and can beam down bosses with sustained fire.

SMGs are ideal for Onslaughter Amon, offering rapid fire, constant DPS, and great mobility for run-and-gun play. Use elemental variants, especially incendiary for good damage even at range.
Elemental Weakness Chart and Damage Guide
When fighting bosses or mobs on the ground, get in close with an Incendiary Shotgun to deal massive burst damage while applying strong burn effects for sustained DPS.
| Repkit | Unique Trait |
|---|---|
![]() Shiny War Paint |
Chrome: On use, grants +30% Fire Rate and +30% Movement Speed for 15s, and reduces Repkit Cooldown by 2s each time Damage is taken. |
With Shiny War Paint, Amon can use a Repkit to gain increased Fire Rate and Movement Speed, which will allow your Hellfire SMG to deal even more damage.
| Ordnance | Type and Overview |
|---|---|
| Gamma Void |
Grenade Ordnance Radiation Exposure: Creates a Singularity for 10s, in which enemies take +40% Radiation Damage over time |
The Gamma Void grenade ordnance creates a Singularity that pulls in mobs, giving you additional crowd control against mobs during a Boss Fight.
Gamma Void also deals continous Radiation Damage, which can be helpful in dealing additional damage to enemies with Shield or Armor HP.

The Melting Furnace Legendary Class Mod is the best option for this Amon build, significantly boosting your Incendiary output. It can be farmed as a drop from Idolator Sol.
Before this, you can also use normal Class Mods that add skill points in the Calamity tree and provide passive boosts to status effect damage and gun damage.
| Shield | Type and Overview |
|---|---|
Super Soldier |
Energy Shield Power Play: When Energy Shield fills, grants an Overshield. When Energy Shield is full, grants 25% Fire Rate, 25% Movement Speed, and regens 1 Ammo/s. |
Super Soldier is the best shield option for the Onslaughter Amon Build, since it provides Fire Rate, Movement Speed, and Ammo Regen when the shield is full.
| Enhancement | Effects |
|---|---|
| Ripper Enhancement |
・High Roller - Guns with Ripper-licensed parts increase Gun Damage by 2% for each consecutive shot fired, for a Maximum 25 stacks. ・Gun Status Effect Damage - Increased by +25%. |
Equipping a Ripper Enhancement with the High Roller effect is best for damage. Ones with Gun Status Effect Damage or raw Gun Damage increases are ideal as well.
| Set Bonus | Effects |
|---|---|
| Deadeye 3/3 |
・Gun Accuracy is increased by 30% ・Gun Critical Hit Damage is increased by 25% ・Every Critical Hit grants 15% Critical Damage per Stack (5 max stacks) for 10s |
| Action Fist 2/3 |
・Melee Damage increased by 15% ・Action Skill Damage increased by 10% |
This Firmware loadout provides a balance damage boost for your Melee and Gun Damage.
At the start of boss fights, activate Onslaughter to gain a massive boost in incendiary damage, status effect application, and shield regeneration, allowing your weapons to burst down enemies much faster.
Burn damage is the key to this build, so keep up constant fire on the boss, focusing especially on critical hit spots to maximize your DPS. With incendiary status effects stacking rapidly, the damage will stack up fast.
If a boss is resistant to fire and has shield or armor health bars, switch to the appropriate element to counter them effectively. While this build excels with incendiary damage, it still delivers strong status effect damage with other elements, though you won’t burn through shielded or armored bosses as quickly as those with red health bars.
Elemental Weakness Chart and Damage Guide

This Amon build is specifically designed for Boss Farming, putting heavy investment in Amon's Incendiary and Status Effect damage.
Through our testing, Normal Bosses in Hard difficulty can be cleared in less than 1 minute under optimized conditions.
This build specializes in single-target burst DPS. It can still be used for leveling and clearing the story, but it's weaker at clearing large groups of powerful enemies, especially the large number of armored Order enemies.
If you are facing difficulties in using this build for leveling, you can try a more survivable build. Our Amon leveling build is more tanky, has powerful Cryo AoE for mobs, and solid boss clearing.
Best Amon Build and Leveling Guide

Best Builds for Each Vault Hunter
| Character | Build |
|---|---|
Vex |
|
Rafa |
|
Amon |
|
Harlowe |
How are you supposed to get the branch three capstone if the levelling guide recommends purchasing skills from branch two?
Onslaughter Fire Amon Boss Farm Build



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maybe just give us a screenshot of the actual build? i dont care for a recommended skill path... just screenshot it so i can click and get to it...