Mortal Shell 2: How To Upgrade Weapons

Published: 13:00, 17 August 2026
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Mortal Shell 2: How To Upgrade Weapons
The Tarforge handles all weapon, sidearm, and Tarstone upgrades in one place. Higher upgrade tiers like this one require rarer materials such as Dorsalite, so plan your resource gathering accordingly.
The Tarforge handles all weapon, sidearm, and Tarstone upgrades in one place. Higher upgrade tiers like this one require rarer materials such as Dorsalite, so plan your resource gathering accordingly.

Weapon upgrades in Mortal Shell 2 run through the Tarforge inside Marrow Keep, but the forge doesn't work when you first arrive. You'll need to fix it before you can start putting materials into your blade.

Mortal Shell 2 is a souls-like action RPG developed by Cold Symmetry, and like any game in the genre, keeping your weapons up to scratch as you push into harder areas is essential. The upgrade system here is built around the Tarforge, a crafting station located inside Marrow Keep that handles weapon enhancements, sidearm improvements, and Tarstone levelling all in one place. Before any of that is available, though, you'll need to get the forge operational and then gather the right materials to actually use it.

Step 1: Find weapons using Merrick's maps

Before you can upgrade anything, you need weapons worth upgrading. Weapons are found as collectables out in the world, typically inside dungeons, and the most reliable way to locate them is to buy maps from Merrick, the merchant found inside Marrow Keep. Each map one marks the area where a specific weapon can be found. Head to the indicated region, enter the dungeon, and collect the weapon inside. It's a straightforward process, and the maps take most of the guesswork out of finding new armaments.

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Merrick sells maps for a small coin cost that mark weapon locations across the world. Buying these early is the most efficient way to build out your weapon collection without aimless exploration.
Merrick sells maps for a small coin cost that mark weapon locations across the world. Buying these early is the most efficient way to build out your weapon collection without aimless exploration.

Step 2: Get the Tarforge working

Once you have a weapon you want to invest in, head to the Tarforge inside Marrow Keep. When you arrive there for the first time, the forge will not be operational. To fix it, you need to bring it some spare parts. These parts are found along the game's main story path and are practically impossible to miss during normal progression, so don't worry about hunting for them specifically. Once you have them, bring them to Franz, the NPC stationed at the Tarforge. Hand them over and he will get the forge up and running.

Step 3: Upgrade your weapons at the Tarforge

With the Tarforge active, interact with the opposite side of the station from where Franz stands to access the upgrade menu. Here you can enhance your weapons, sidearms, and Tarstones. The upgrade screen shows your current weapon level, what it costs to reach the next tier, and what materials are required.

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Franz operates the Tarforge. Bring him the spare parts found along the main story path and he will get the forge running. Once it is active, interact with the opposite side of the machine to access upgrades.
Franz operates the Tarforge. Bring him the spare parts found along the main story path and he will get the forge running. Once it is active, interact with the opposite side of the machine to access upgrades.

Lower upgrade levels require coins alongside a material called Ventirium, both of which are relatively easy to accumulate through normal play. As you push into higher upgrade tiers, the required materials become rarer. Advancing a weapon to the upper levels demands Dorsalite and other scarce resources that take more deliberate effort to gather. All upgrade materials can be found through exploration across the game's regions, but if you find yourself short on a specific resource, Merrick can exchange most materials for coins, giving you a reliable fallback when your exploration hasn't turned up what you need.

Quick tip: Don't spread your upgrade materials thin across multiple weapons early on. Pick one weapon that suits your playstyle and push it as far as your resources allow before branching out. A heavily upgraded single weapon will serve you far better than several weapons sitting at modest enhancement levels.

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