How to Power Up the Furnace in Absolum

By Ambar Jimenez | 2025-10-10 09:32:25
The Grandery is the first major region in Absolum, a stunning rogue-lite beat ‘em up that blends deep combat with permanent progression. As you near the final confrontation with the Underking, you’ll find yourself venturing into the Dwarven mines. Here, a locked elevator shaft presents a tantalizing secret: the path to The Deep Mines.This alternative late-game route is more than just a diversion; it’s an absolute game-changer for players looking to maximize their run power with superior loot and items. But to access it, you first need to restore power by feeding the colossal furnace deep inside the mine.If you’re ready to upgrade your run from good to god-tier, here is your essential, step-by-step guide on how to locate the furnace, power it up with the most brutal energy source imaginable—your enemies—and unlock the coveted Deep Mines area.

The Quest for Power: Locating the Grandery Furnace

The furnace is the heart of the Grandery’s machinery, and activating it is a permanent meta-progression unlock that will benefit all future runs.

Navigating to the Furnace Node

To find the furnace, you must be approaching the end of your run, where the path naturally funnels toward the final boss, the Underking.
  • Enter the Mines: Once you choose the mine route on your map, proceed as usual.
  • Locate the Room: The furnace is housed in a specific environment node within the mines. While it usually appears in this final mining section, map generation in Absolum is randomized. If you don't encounter the furnace on your first attempt, don't worry—simply keep making your way to the mines in subsequent runs, and the specific furnace node will eventually appear.
  • Breaking the Seal (and Not Yourself!)

    Once you spot the colossal furnace, the first thing you’ll notice is the closed doors. Before you can feed the fire, you have to break the lock:
    • The Attack: Use your chosen fighter's attacks (Light or Heavy) to break open the furnace doors.
    • The Warning: Be careful not to accidentally jump or roll into the flames while the doors are still intact, as this will result in minor HP loss.
    • The Permanence: Crucially, once you successfully break the doors, they remain broken and open permanently for all future runs, making the activation process faster on subsequent playthroughs.

    Fueling the Flames: Powering Up the Furnace

    This is where Absolum's excellent combat design shines. Unlike a typical fetch quest, you don't need a part or a lever—you need pure, raw energy.

    The Ultimate Sacrifice

    To power up the furnace, you must literally throw or push enemies into its flames. The machine is calibrated to run on the life force of your foes, turning the room into an impromptu, deadly obstacle course.

  • Engage the Foes: Allow the mine’s enemies to gather around the furnace.
  • Execute the Throw: Use your character's combat mechanics that allow for enemy movement:

    • Grapple/Throw Abilities: Many of Absolum's characters have a grappling or throwing move. Use this to pick up or launch an enemy directly toward the open flames.
    • Heavy Knockback: Use powerful heavy attacks or arcana with significant knockback force to send enemies flying into the fire pit.
  • Monitor the Progress: Pay attention to the meter on the left side of the screen. This meter actively tracks the power level of the furnace, going up with each successful enemy 'sacrifice.'
  • Full Power: The furnace requires only a handful of enemies to reach maximumcapacity. Once it's fully powered up, you'll receive a clear in-game prompt, and the intricate machinery in the background will loudly roar back to life.
  • The Deep Mines: Why This Route is Worth the Effort

    Successfully powering the furnace triggers a permanent change in the Grandery'slayout, offering one of the most advantageous late-game paths available.

    Unlocking the Elevator Shaft

    The immediate benefit of the activated furnace is the unlocking of the previously inaccessible elevator shaft located near the mine’s entrance node.

    • The quest is completed, and the elevator will be marked on your map, ensuring you never miss this powerful shortcut.
    • Using the elevator for the first time grants you access to a completely new area: "The Deep Mines."

    Loot, Loot, and More Loot

    The Deep Mines represent the third possible late-game area you can choose to visit before the inevitable fight with the Underking. For players who have successfully upgraded their base character and are focused on maximizing their build for a deep run, this is the superioroption.

    • Higher Tier Rewards: The Deep Mines are filled with tougher, more challenging foes than the standard late-game mines. The increased difficulty is directly rewarded with better quality loot, including more powerful relics, higher-tier gold drops, and crucial Arcana upgrades.
    • Preparation for the Underking: By opting for this high-reward, high-risk path, you ensure that yourcharacter is equipped with the best possible gear and resources goinginto the Underking boss battle—a crucial advantage before sailing off to the next region, Jaroba.

    In short, if you are past the early-game learning curve and are looking to maximize your power, powering up the furnace is essential. It's the key to a better build, better loot, and ultimately, a moredominant run against the Underking. Don't skip this quest—it’s thedifference between a good run and an Absolum run.

    Platform(s): Microsoft Windows PC, Nintendo Switch, PlayStation 4 PS4, PlayStation 5 PS5
    Genre(s): Beat'em up, roguelike
    Developer(s): Guard Crush Games, Supamonks, Dotemu
    Publisher(s): Dotemu, Gamera Games
    Release date: October 9, 2025
    Mode:
    Video preview



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