Mortal Shell 2: Obsidianite Mines Walkthrough and Location

The Obsidianite Mines sit at the bottom of the mining pit in the Deserted Slums, deep in the Ruins of Mammon region of Mortal Shell 2. It is a short vertical dungeon built almost entirely around controlled falls, and the reward at the end is the Obsidian Hammer, one of the game’s heavy blunt weapons.

Quick answer: Fast travel to the Outskirts of Mammon beacon, head west and down through the siege camp and rope bridges into the Deserted Slums quarry, then take the mine entrance in the central pit. Ride the elevator down, drop through the collapsing wooden floor, keep descending to the chasm floor, and take the jump pad up to kill the Prophet of Profane Infinities for the Obsidian Hammer.

What you need before entering the Obsidianite Mines

Access to this stretch of Mammon depends on one thing. The corruption blocking the southern jump pad at Marrow Keep has to be cleansed first, which means you need Mether’s Breath from clearing one of the main gates. Once that pad works, the Outskirts of Mammon beacon becomes your staging point and the mine is a short run away.

There is no level gate on the dungeon itself, but every enemy in Mammon hits hard and carries a lot of health. The boss is slow and readable, so a mid-teens character with a well-upgraded weapon can clear it. Going in badly underlevelled just means repeating the whole descent after every death, since there is no beacon inside.

Tip: Merrick in Marrow Keep sells the Obsidian Hammer’s map for 1,300 Coins. Buying it marks the location on your own map if you would rather not track the route by landmarks.

Route from the Outskirts of Mammon beacon to the mine entrance

Warp to the Outskirts of Mammon beacon and head west. Watch the ground on the way down, since floor traps are scattered along this descending path.

Pass the small soldier camp near the ledge and cross the wooden bridge beyond it. Follow the trail left as it drops toward the mining area, then keep going until you reach the larger siege camp.

Armored player character running up a narrow rocky passage in the Ruins of Mammon — The stone paths through Mammon slope steadily downhill toward the Deserted Slums quarry. Image: Cold Symmetry

Continue until you hit a Bone Gate. Interact with it, then use the jump pad on the ledge to cross the gap to the far side.

Run past the working miners and cross the remaining rope bridges. An archer guards one of them and an armored Stoner guards the next. Neither has to die, so sprinting through is a legitimate option if you want to save healing charges for the boss.

Player character moving along a torch-lit rocky path with the combat HUD on screen — Torch-lit stretches mark the approach to the Deserted Slums mining complex. Image: Cold Symmetry

Climb the stairs to the right of where the Stoner stands, take the left turn at the top, and follow the wooden walkway. This opens onto the large mining complex in the Deserted Slums.

Look for the big circular pit in the lower section, the one with miners working in it. The entrance to the Obsidianite Mines is set into the side of that pit at the bottom. Cleansing the nearby Deserted Slums beacon first gives you a much closer respawn point if the boss kills you.

Cleansing the Deserted Slums beacon before descending into the mining pit — Cleansing the Deserted Slums beacon sets your respawn right next to the mine entrance. Image: Cold Symmetry

Obsidianite Mines dungeon walkthrough

The layout has no branching corridors. Every problem here is about height, and the only real risk outside combat is taking chip damage from falls that were meant to be broken up into shorter hops. Pressing the light attack button mid-fall cancels fall damage, which is worth remembering on the longer drops.

Take the elevator down at the entrance. A Tarblighted Miner waits as you step off, so deal with it before moving deeper.

Follow the passage into a room whose floor is covered in wooden planks. Do not walk into the middle yet. Hug the edge, cross to the far side, and grab the Ventrium sitting there.

Now step onto the centre of the planks. The floor gives way and drops you onto a wooden platform below.

Work down the stack of wooden platforms one at a time until you reach the candle-lit ground. Three more Tarblighted Miners are stationed here, and a second Ventrium is on this level once they are cleared.

Player advancing up a wooden bridge toward a hostile miner inside the dark mine — Tarblighted Miners hold the wooden platforms on the way down. Image: Cold Symmetry

Head through the doorway and follow the tunnel. Two Lithopods block the path, and there is Resolve to pick up along the way. At the end, turn left toward a Batushka guarding a Resolve Tree.

Look over the edge below the Resolve Tree for a horizontal stone pillar and drop onto it. Batushkas sit on both sides. The one perched higher is easiest to remove with your sidearm before it closes in.

Use the obsidian pillars to step down through the void chamber to the lowest floor. More Tarblighted Miners are waiting, and the growth down here holds Dorsalite. If you fall to the bottom too early, there is still a launch pad to bring you back up, so a mistimed drop is not fatal to the run.

Step onto the jump pad on the chasm floor. It launches you across to the arena where the Prophet of Profane Infinities is waiting.

Prophet of Profane Infinities boss fight

The Prophet is an oversized version of the hammer-wielding enemies you have already fought across Mammon. Its moveset is slow and telegraphed, but the swings cover a wide arc and it can apply Stasis, which locks you in place long enough for a follow-up to land.

Stay outside the arc of the hammer, let a swing finish, then step in for one or two hits and back out. Overcommitting is the main way this fight goes wrong, and because there is no beacon inside the mine, dying means running the entire descent again. Patience costs you a couple of minutes; greed costs you the whole trip.

Obsidianite Mines rewards and full item list

Killing the Prophet drops both the weapon and a lore item, and a confirmation prompt appears on screen naming the Obsidian Hammer. That prompt is how you know the dungeon’s main objective is done. The hammer then sits in your inventory and has to be equipped manually before you can use it.

On-screen prompt confirming the Obsidian Hammer has been acquired after the boss fight — The New Weapon Acquired prompt for the Obsidian Hammer confirms the dungeon is complete. Image: Cold Symmetry

Item	Where it is
Obsidian Hammer	Dropped by the Prophet of Profane Infinities
Paradoxical Scripture	Dropped by the Prophet of Profane Infinities
Ventrium x2	One across the plank floor, one on the candle-lit level below
Dorsalite	In the growth at the bottom of the void chamber

The Obsidian Hammer is Proxima’s signature melee weapon, described in-game as a brutalist chunk of obsidianite. It swings slowly, much like the Great Martyr’s Blade, but it deals heavy damage and staggers enemies reliably. Its weapon ability is Heavy Stomps, and it upgrades with Ventrium through the early levels before switching to Laterite and then Dorsalite at higher ranks.

How to leave the Obsidianite Mines

You do not have to climb back out. A translucent orb sits in the boss arena, and interacting with it warps you to the dungeon entrance where you can walk out past the elevator. If you would rather retrace your steps, the elevator at the top still works normally.

Before you head off, sweep the arena and the lower chasm for anything you skipped on the way down. The Ventrium and Dorsalite here feed straight into upgrading the hammer you just picked up, and once you leave with the boss dead, there is no reason to make the descent a second time.