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Borderlands 4 Guide

How to Unlock the Legendary Furnace Forgeknight Class Mod

Class Mods
Legendary Loot
By Mobalytics
Updated on Oct 1, 2025
Oct 1, 2025

Overview

Furnace is a Forgeknight Class Mod for the Vault Hunter Amon.

His Furnace Class Mod turns Damage from Fellfrost, Hoarcleave, Fulminating Fist, and Stormcutter is Converted to Incendiary Damage.

borderlands 4 furnace class mod

Thanks to Imortilize for providing the information and check out all Amon Class Mods here!

How to Get

Unlock Location

  • You will have to look for the Fortress Indomita in Fadefields (Idolator's Noose).

borderlands 4 fortress Indomita

Farm Method:

  • Defeated Idolator Sol in the Campaign.
  • Defeat Idolator Sol who can drop Furnace.
  • Farm until Furnace drops.

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