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Borderlands 4 Forge Master Review — Legendary Class Mod

Published: 8/15/2026 · Updated: 11/15/2026 · As of 2026-07

Red Text
I'm a rollin' thunder, pourin' rain.

This review was machine-translated from the Japanese original. Numbers are checked against the original; if the wording reads oddly, the Japanese version is authoritative.

A class MOD that lets you fire Forgeskill (Forge Skill) once more even while on cooldown, the definitive skill spamming build. Since you can stack and fire a skill that normally requires waiting before reuse, instantaneous damage and skill rotation change entirely. For those who want to make skills their main cannon, aimed at Amon.

🧩 Source of the red text A quote from AC/DC’s song “Hells Bells” lyric “I’m rollin’ thunder, pourin’ rain” (matches web search). The image of thunder and heavy rain ties into the roughness of spamming the skill. Precise verification against the band’s primary lyric source is unverified = (unverified).

What kind of class MOD? (Beginner’s perspective)

• Legendary class MOD exclusive to Amon (Forge Knight line)
• Theme is Forgeskill cooldown crushing
• Allows a skill that normally cannot be used while on cooldown to be fired once additionally even during cooldown
• Dedicated stat Forgeskill Damage +60% = the power of a single skill shot is directly increased
• Fits the “make skills your main cannon and hammer them continuously” playstyle for Wraith tiles

Unique effects (Mechanics)

The dedicated stat +N% is a level-dependent reference value (added 2026-08-06) The +N% below originates from Lootlemon / MentalMars. In-game, the dedicated stat values change with level (only the type of stat is fixed, not the numbers).

• Measured: duration and damage types are Lv45 = +41% / Lv47 = +43%. Other MODs / other VH have the same values at the same Lv (not dependent on individual roll or prefix) = provisional formula value% = Lv − 4
• With this formula, the web’s +45% is written as a fixed value equivalent to Lv49.
• ⚠️ Whether numbers from other categories such as +23% / +60% follow this formula is (unverified) (cooldown speed types might be Lv-independent at +23% for Lv45/47).

Forge Master: All Forgeskill become usable once even while on cooldown. Dedicated stat +60% Forgeskill Damage.

• In-game: All Forgeskill become usable once while on cooldown
• Web (Lootlemon): All Forgeskills can now be used once while on Cooldown. Always comes with the unique Stat: +60% Forgeskill Damage
• Dedicated stat +60% Forgeskill Damage (significant increase to skill damage)
• Skill bonuses (+N) and accompanying stats vary per individual (i.e., selection points).
• Weakness: Since it’s “once during cooldown”, after using that one shot you return to normal cooldown waiting = use it as an insertion rather than spamming

Drop Farming

Build Synergy

• The definitive Forgeskill spamming build: cooldown crushing + Forgeskill Damage +60% makes a Amon build that uses skills as the main cannon viable instantly
• Cooldown reduction and multiplicity: stacking with Action Skill cooldown reduction effect further increases the number of skill casts
• Explosive firepower: the inserted additional skill can create an instant burst = strong for boss killing
• The target skill that receives the effect varies per individual (i.e., selection points).

Summary

• Exclusive to Amon (Forge Knight). The definitive skill spamming build that lets you fire Forgeskill once while on cooldown.
• Dedicated stat +60% Forgeskill Damage greatly increases the damage of a single skill shot.
• Can create an instant burst with the inserted additional skill.
• Obtained from Primal Guardian Radix (Arch of Radix).

Related

• Same class line (Amon / Forge Knight): Blacksmith / Elementalist / Furnace / Lamplighter / Shatterwight / Viking
• Reference: Lootlemon - Forge Master / MentalMars - Forge Master