Mortal Shell 2: How to Cleanse the Obsidian Vault Beacon (Temple of Obscenity)

The Obsidian Vault is one of the beacons you can cleanse in Mortal Shell 2, and doing so drops you into a corrupted dungeon called the Temple of Obscenity. The run ends by reviving a shell, but only if you find the right structure deep inside a foggy abyss and select the option to cleanse it.

Quick answer: Interact with the Obsidian Vault beacon and choose “Cleanse Beacon.” Fight through the Temple of Obscenity, use the red-clone glide to cross the abyss, select “Cleanse Corruption” on the dark tree-like structure, then return to the surface to revive Genessa the Wayward and cleanse the beacon.

Where the Obsidian Vault beacon is

The Obsidian Vault sits in The Unfound Path region. It is one of the many beacons that must be cleansed by entering a mini dungeon and completing it. None of the beacons are missable, so if you skip it during the story you can return in free-roam after the final boss and finish it before starting New Game+.

To begin, approach the beacon and pick “Cleanse Beacon” from its menu. This opens the portal into the dungeon.

Clearing the Temple of Obscenity

Step through the portal. Just past the entrance, you can pick up a Pestilent Scripture before moving deeper.

Enter the Temple of Obscenity and deal with the first ghostly specter that appears. These enemies drift through the halls, so keep your guard up as you push forward.

Work through the corridors and climb the stairs. A second ghost blocks the way further in, and defeating it lets you grab another Pestilent Scripture.

Continue until you reach an overlook facing a large, pillar-filled abyss. Two snake-like specters attack here. Clear them before you deal with what comes next.

Fight the spiders that swarm this stretch. Mixing your sidearm with melee attacks is an efficient way to bring them down while keeping distance.

Loot the altar in this area to collect Obscenity, then get ready to descend into the abyss.

Crossing the abyss and cleansing the corruption

The abyss is the part that trips people up. The platforms are far apart, and the only way to reach them is a glide mechanic tied to the red ghostly clones that appear when you leap. Line yourself up with the target platform before you commit to each jump.

Jump off the ledge into the abyss and glide using the red clones toward the distant platform.

Land at the dark, tree-like structure and select “Cleanse Corruption.” This is the main objective inside the abyss.

Glide across to the giant statue platform. Several giant spiders wait here, so clear them out before you move again.

Glide back to the cleansed structure platform, then glide once more to return to the main temple entrance.

Leave the dungeon and choose “Yes” when asked to return to the surface.

What the offering (Obscenity) is

Obscenity is the offering you take from the altar partway through the run. It is a key item picked up during the dungeon, gathered alongside the two Pestilent Scriptures you find on the way in. Treat it as loot to collect on your route rather than a puzzle item you have to place somewhere to progress.

How to confirm the beacon is cleansed

Returning to the surface after cleansing the corruption completes the run. The game confirms success on screen, first with a “SHELL REVIVED” prompt naming Genessa the Wayward, then with a “BEACON CLEANSED” message. Genessa is now available as a shell, and the Obsidian Vault no longer counts against your remaining beacons.

If the beacon still shows as active, the most common cause is exiting before selecting “Cleanse Corruption” on the tree-like structure. Glide back into the abyss, cleanse that structure, and then leave through the temple entrance to trigger the revive and the cleanse.