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Mortal Shell 2 Tarforge Location and Upgrade Guide

Find the Mortal Shell 2 Tarforge in Marrow Keep, unlock its five described functions, and track weapons, sidearms, Tarstones, and material limits.

8/21/2026 Last updated: 8/21/2026 6 min read

The Mortal Shell 2 Tarforge appears inside Marrow Keep, near the main Beacon and beside the smith Franz. The route notes say five items activate its functions, covering melee weapons, sidearms, Tarstones, smelting, and higher upgrade limits. Exact retail costs, caps, and any alternative unlock method are To be confirmed.

Where to find the Tarforge

The route places the Tarforge in a nearby chamber reached by taking the path left from Marrow Keep’s main Beacon. Franz stands beside the machine and explains that it needs parts before every function is available. This makes Marrow Keep the central return point for the upgrade route.

Tarforge in Mortal Shell II

The description describes the location after the prologue. It does not establish whether every store version uses the same approach, whether the Tarforge can be accessed before the prologue ends, or whether a different NPC can replace Franz. Those details are To be confirmed.

The five described unlock items

The current game version name Muradean Actuator for melee weapon upgrades, Obsidian Lathe for sidearm upgrades, and Etching Needles for Tarstone upgrades. It names Foundry Stone for smelting and Endless Core for removing the standard upgrade cap. The first four are described as items delivered to Franz, while Endless Core is installed through the Tarforge menu.

Tarforge upgrade route through a Mortal Shell II cavern

The route places Muradean Actuator in a prologue chest near the Village Outskirts Beacon. Obsidian Lathe appears in Martyr’s Tomb near Widow’s Overlook, and Etching Needles in Glutted Mire before the Magdalena encounter. Foundry Stone is described near Outskirts of Mammon, while Endless Core is placed in the Hidden Nave area of The Unfound Path.

What each function adds

Muradean Actuator is described as the part that activates melee weapon enhancement. Obsidian Lathe adds sidearm enhancement, which keeps ranged progression separate from the primary weapon. Etching Needles adds Tarstone tempering and the Tarcore progression used by later stone upgrades.

Foundry Stone adds smelting, which the route describes as returning a weapon or sidearm to its base state while refunding spent upgrade materials. Endless Core lifts the standard ceiling on weapons and sidearms. The exact refund amount, maximum level, and menu wording are To be confirmed.

Weapon and sidearm upgrades

The Tarforge guide says weapon and sidearm upgrades use Coins plus named smithing materials. It lists Ventrium, Laterite, Dorsalite, Thoracium, and Ossinite as progression materials. Higher materials appear in deeper routes the route shows, though the final level range for each name is not independently confirmed.

Upgrade the weapon you actually use before spreading early materials across several options. Once Obsidian Lathe is active, test the main sidearm and confirm how its ability and Tarstone compatibility interact with the Tarforge menu. Universal best weapon advice is To be confirmed.

Tarstone leveling at the forge

The Tarforge guide says a Tarstone gains XP while slotted into an equipped weapon or sidearm during enemy kills. At the first described threshold, returning to the forge costs Coins and grants Tarcore, while a later step uses Tarcore to improve a stone further. Rotating several stones can build the resource needed for a preferred final setup.

The current game version disagrees on some thresholds and level language. Keep the currently displayed XP, cost, and Tarcore requirement with the build that produced it. Do not merge a beta value into a universal retail guide until the current game confirms it.

Route order for a first run

Collect Muradean Actuator in the prologue if the chest is present, then deliver it after reaching Marrow Keep. Search Martyr’s Tomb for Obsidian Lathe and Glutted Mire for Etching Needles before committing to late Tarstone planning. Pick up Foundry Stone near Outskirts of Mammon and pursue Endless Core only when The Unfound Path is available.

This order follows the route descriptions and keeps each new function connected to the part that unlocks it. Exact enemy requirements, boss gates, chest positions, and alternate choices are To be confirmed. Record the menu option that appears after each delivery so the route can be corrected against the current build.

Which Tarforge claims are strongest?

The routes agree on the five-function structure more clearly than they agree on every location detail. Muradean Actuator, Obsidian Lathe, Etching Needles, Foundry Stone, and Endless Core are the listed parts, while the official store description independently confirms that the game has extensive weapon upgrades and free exploration. The exact route for each part remains community confirmation unless the current client shows the same path.

Use the Tarforge menu as the final check after each delivery. Confirm that the new function appears before planning a weapon or Tarstone upgrade around it. This matters for sidearms and smelting because a page can list the part while a different build still presents a different cost, cap, or refund rule.

How should you plan upgrades at the forge?

Choose one main weapon before spending rare materials, then unlock sidearm and Tarstone functions when the route makes them available. The current game version lists Coins plus named smithing materials for weapons and sidearms, while Tarstone progress uses combat XP and Tarcore. Keep those systems separate in your notes so the word upgrade does not hide different requirements.

The current confirmation does not prove the final level cap, refund amount, Tarcore threshold, or best first upgrade. Record the displayed requirement, platform, and build, then update the page when stronger client details appear. Any universal cost table or fastest route remains To be confirmed.

The safest first visit is therefore an information run. Find Franz, inspect each locked function, and record which part the current menu requests. Spend only after the weapon, sidearm, or Tarstone function is visibly active. This keeps the Tarforge page useful across builds without guessing the missing costs.

What should you do when an unlock is missing?

Check the item name, the delivery NPC, and the build before assuming the part was lost. The routes place the five listed items in different regions, and the current pages do not prove every chest, boss, or story condition. A missing menu function is therefore a verification problem, not a reason to invent a second route.

Record the displayed Tarforge function after each delivery. If the menu changes but the cost does not match the route, preserve both the client value and the route version. Final caps, refunds, materials, and alternate unlocks remain To be confirmed.

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