One-Handed Thunder Hammer

Base Damage

12.1

Variants

Attacks

Overview

The One-Handed Thunder Hammer is a melee weapon added in Patch 15.0. It stores Power Charges and spends them on stronger attacks. It is a separate weapon from the two-handed Thunder Hammer.

Four classes can equip it: Tactical, Assault, Bulwark and Techmarine. A Tactical carrying it has no primary weapon.

Every value on this page is from the game files at Hotfix 15.1 and is what the calculator uses. None of it has been tested in game yet.

Variants

Damage = Base × Variant Multiplier. Cleave column shows the variant's cleave bonus added to each attack's base cleave.

Name	Tier	Defense	Multiplier	Damage	Cleave Bonus
Standard-Issue	Standard	Balance	1	12.1	+0
Master-Crafted Alpha	Master-Crafted	Balance	1.15	13.91	+3
Master-Crafted Beta	Master-Crafted	Fencing	1.1	13.31	-1
Salvation of Bakka Alpha	Artificer	Balance	1.45	17.54	+3
Salvation of Bakka Beta	Artificer	Fencing	1.2	14.52	-1
Salvation of Bakka Gamma	Artificer	Block	1.4	16.94	+0
Ophelian Liberation Alpha	Relic	Balance	1.9	22.99	+3
Ophelian Liberation Beta	Relic	Fencing	1.65	19.96	-1
Ophelian Liberation Gamma	Relic	Block	1.8	21.78	+0
Power Maul ↗	Heroic	Balance	1.8	21.78	+4

Heroic Variants

The Heroic-tier One-Handed Thunder Hammer has a dedicated page covering its exclusive Heroic perk and how it changes the weapon.

Power Maul ↗, Heroic perk: Crackling Hammerfall

Attacks

Motion Value (MV) multiplies base damage. Damage is one hit on the Standard-Issue variant with no perks (Base × MV). For another variant, multiply it by that variant's Multiplier. Cleave is the most enemies one hit can strike, before the variant's Cleave Bonus.

Attack	Type	Motion Value	Damage	Cleave	Hits
Light 1	Light	1.25	15.13	5	1
Light 2	Light	1.25	15.13	5	1
Light 3	Light	1.25	15.13	5	1
Underhand Swing 1	Heavy	2.5	30.25	4	1
Underhand Swing 2	Heavy	2.5	30.25	5	1
Echoing Swing Shockwave Cone shockwave, 10m long, spawned by Underhand Swing. Attack enabled via "Echoing Swing" perk on One-Handed Thunder Hammer.	Heavy	1	12.1	No cap	1
Charged Impact Replaces the Light Attack while a Power Charge is held. Spends one Power Charge.	Special	1.75	21.18	10	1
Charged Impact (Reverberating Slam) Replaces Charged Impact and hits the ground twice. Spends one Power Charge. Attack enabled via "Reverberating Slam" perk on One-Handed Thunder Hammer.	Special	1.75	21.18	10	×2
Accumulation Stance Hold attack with no Power Charges to gain up to 3 Power Charges. The pulse knocks back up to 10 enemies within 5m.	Special	0.5	6.05	10	1
Energy Loop Hold attack after any Light Attack or Underhand Swing to gain 1 Power Charge. The pulse knocks back up to 10 enemies within 5m.	Special	0.5	6.05	10	1
Devastating Blow Hold attack with at least one Power Charge to perform a Ground Slam. Spends all Power Charges. Damage is multiplied by 1.3 for each Power Charge spent. Attack enabled via "Crackling Hammerfall" heroic perk on Power Maul One-Handed Thunder Hammer. Damage shown is on the Power Maul, from 1 to 4 Power Charges spent.	Heavy	2	56.63 to 124.41	10	1
Energised Strike	Sprint	1	12.1	10	1
Energised Strike (Jump Pack Dash)	Sprint	1	12.1	10	1
Falling Attack	Fall	3	36.3	15	1
Ground Pound	Ground Pound	6.4	77.44	15	1
Ground Pound (Fully Prepared)	Ground Pound	6.4	77.44	15	1
Shield Bash	Shield Bash	0.5	6.05	10	1
Shield Rush (Uncharged)	Shield Bash	2.1	25.41	100	1

Charged Impact, Devastating Blow and Energised Strike show the direct hit only. Their area bursts are not added. Falling Attack and Ground Pound show the landing burst, as on every other weapon.

Ground Pound (77.44) and Shield Rush (25.41) use the motion values in the game files. On Standard-Issue, every other weapon lands 60.8 to 61.6 with Ground Pound and 19.8 to 19.95 with Shield Rush (Uncharged), so these two rows are well above the rest and still need an in-game test.

Power Charges

The hammer holds up to 3 Power Charges, or 4 with the Capacity Increase perk. A charge is lost after 5 seconds without dealing damage, or 10 seconds with Sustained Charge.

Ways to gain Power Charges:

Source	Kind	Description
Accumulation Stance	Attack	Hold attack with no Power Charges to gain up to 3 Power Charges.
Energy Loop	Attack	Hold attack after any Light Attack or Underhand Swing to gain 1 Power Charge.
Hyperenergetic Loop	Perk	Energy Loop gains 2 Charges instead of 1.
Rapid Recharge	Perk	Killing 5 foes in quick succession with the Light Combo restores 1 Power Charges. Cooldown is 15 seconds.
Deflective Charge	Perk	Perfect Parry, Perfect Block, and Perfect Dodge instantly generate 1 Power Charges. Cooldown is 20 seconds.

Attacks that spend Power Charges:

Attack	Needs	Description
Charged Impact	Any variant	Replaces the Light Attack while a Power Charge is held. Spends one Power Charge.
Charged Impact (Reverberating Slam)	Reverberating Slam perk	Replaces Charged Impact and hits the ground twice. Spends one Power Charge.
Devastating Blow	Power Maul	Hold attack with at least one Power Charge to perform a Ground Slam. Spends all Power Charges.

Energised Strike, its Jump Pack Dash version and Ground Pound also have charged versions. They differ only in their area burst, so the calculator has no separate rows for them.

The calculator does not track how many charges you hold. It models Power Charges in four places:

Charged Impact, Accumulation Stance and Energy Loop each have a row in the attack table. The Accumulation Stance and Energy Loop rows are the pulse those moves release: MV 0.5, up to 10 enemies within 5m.
Charge Overflow toggle (needs the Charge Overflow perk): multiplies every melee attack by 1.1. The perk lasts 20 seconds after reaching the maximum number of Power Charges.
Power Charges Spent picker (Power Maul only): sets how many charges Devastating Blow spends, 1 to 3, or 4 with Capacity Increase. Each charge spent multiplies its damage by 1.3.
Holding a Power Charge toggle on the Health tab (needs the Energetic Nimbus perk): 15% less Ranged Damage.

Perk Tree

The tree has 9 columns with a top and a bottom perk in each. A build can hold up to 10 perks. Both rows run straight across, and columns 3 and 6 connect the top and bottom rows. Two extra perks hang off column 7: Hyperenergetic Loop needs Expanded Impact (top row) and Deflective Charge needs Preparedness (bottom row).

Descriptions are the in-game text. The Calculator column says what the calculator does with each perk.

Column	Row	Perk	Description	Calculator
1	Top	Perpetual Strength	Melee Damage increases by 5%.	Additive with variant multiplier and other +% damage perks.
1	Bottom	Perpetual Speed	Melee Attack Speed increases by 5%.	No effect in the calculator.
2	Top	Sustained Charge	Increases the time before a Power Charge is lost without dealing damage from 5 to 10 seconds.	No effect in the calculator.
2	Bottom	Hard Target	While performing a Light Combo, you take 15% less Ranged Damage.	Health tab: 15% less Ranged Damage with the During Light Combo toggle on.
3	Top	Perpetual Strength	Melee Damage increases by 5%.	Additive with variant multiplier and other +% damage perks.
3	Bottom	Perpetual Speed	Melee Attack Speed increases by 5%.	No effect in the calculator.
4	Top	Charge Overflow	Reaching the maximum Power Charge stack increases Damage by 10% for 20 seconds.	Toggle: Charge Overflow. Multiplicative bucket: multiplies independently against the rest of the damage formula. Applies to every melee attack while active.
4	Bottom	Energetic Nimbus	Incoming ranged damaged is reduced by 15% while having a Power Charge stack of 1.	Health tab: 15% less Ranged Damage with the Holding a Power Charge toggle on.
5	Top	Adamant Stance	While in Accumulation Stance you don't lose control when taking Heavy Hits and cannot be knocked back.	No effect in the calculator.
5	Bottom	Rapid Recharge	Killing 5 foes in quick succession with the Light Combo restores 1 Power Charges. Cooldown is 15 seconds.	No effect in the calculator.
6	Top	Perpetual Strength	Melee Damage increases by 5%.	Additive with variant multiplier and other +% damage perks.
6	Bottom	Perfect Reprisal	After a Perfect Parry, Perfect Block, or Perfect Dodge, the next Light Attack deals 25% more damage for 7 seconds.	Toggle: Perfect Reprisal. Additive with variant multiplier and other +% damage perks. Applies to every melee attack while active.
7	Top	Expanded Impact	Area-of-effect radius of Ground Slam is increased by 50%.	No effect in the calculator.
7	Bottom	Preparedness	Killing Majoris-level or higher enemies reduces the cooldown of your class ability by 3%.	No effect in the calculator.
7	Extra (top)	Hyperenergetic Loop	Energy Loop gains 2 Charges instead of 1.	No effect in the calculator.
7	Extra (bottom)	Deflective Charge	Perfect Parry, Perfect Block, and Perfect Dodge instantly generate 1 Power Charges. Cooldown is 20 seconds.	No effect in the calculator.
8	Top	Capacity Increase	Maximum number of Power Charges increased to 4.	Raises the Power Charges Spent limit from 3 to 4 on the Power Maul.
8	Bottom	Brutal Reforge	Killing a Majoris-level or higher enemy restores 1 Armour Segment if Health is lower than 30%.	No effect in the calculator.
9	Top	Reverberating Slam	Charged Impact hits the ground twice.	Replaces the Charged Impact row with Charged Impact (Reverberating Slam).
9	Bottom	Echoing Swing	Underhand Swing Attacks spawn shockwaves.	Adds the Echoing Swing Shockwave row.
Heroic	Power Maul	Crackling Hammerfall	Hold the Attack button to perform a powerful Ground Slam that consumes all Charges. Damage is increased by 30% per Charge spent.	Picker: Power Charges Spent. Multiplicative bucket: multiplies independently against the rest of the damage formula. Applies to Devastating Blow only: ×1.3 for each Power Charge spent, compounding (×1.3, ×1.69, ×2.197, and ×2.856 at 4 charges with Capacity Increase). Adds the Devastating Blow row.

Charge Overflow's description is missing from the English game text at Hotfix 15.1. The line above is the Patch 15.0 sentence with the Hotfix 15.1 numbers (10% and 20 seconds).

Perfect Reprisal's description says the next Light Attack. In the game files the bonus applies to every melee attack for the 7 seconds, and the calculator follows the files.