TL;DR

• The Prophet of Profane Infinities is an optional miniboss found at the bottom of the Obsidianite Mines dungeon in the Ruins of Mammon.
• Defeating him is the only way to get the Obsidian Hammer — one of the eight main weapons in Mortal Shell 2.
• He is a slow, heavy hammer-swinger — a stronger version of the Prophet Hammer enemies you’ve seen in Mammon.
• His attacks telegraph clearly and he stands still briefly after each swing — use those windows to deal damage.
• Tiel’s Shadow Dodge makes this fight very easy. Time a dodge and follow up with a Shadow Strike.
• Parrying works well too — his swings are slow and readable once you’ve seen them once or twice.
• No spirit summon is available for this fight.

Prophet of Profane Infinities Boss Guide Mortal Shell 2

The Prophet of Profane Infinities is a miniboss waiting at the deepest point of the Obsidianite Mines dungeon in the Ruins of Mammon. He is not required to complete the main story, but you absolutely want to fight him — he drops the Obsidian Hammer, one of the game’s eight primary melee weapons and the only heavy blunt option in the full arsenal. If you want that weapon, you have to go through him.

The good news is that this is not one of the most brutal fights in the game. He is a slow, predictable boss that gives you clear openings after every swing. But the dungeon leading up to him can catch you off guard, and dying means running the whole route again — so it helps to know what you’re walking into. This guide covers how to reach the Obsidianite Mines, how to navigate the dungeon, and how to bring the Prophet down cleanly.

If you are still working through earlier areas of Mammon and gearing up, check out our Mortal Shell 2 beginner’s guide for a solid foundation, and our breakdown of the Mortal Shell 2 all boss list to see where this fight fits into the bigger picture.

Who Is the Prophet of Profane Infinities?

The Prophet of Profane Infinities is a large, hammer-wielding enemy closely related to the Prophet Hammer enemies you encounter throughout the Ruins of Mammon. He’s a tougher version of that enemy type — more health, harder hits, and a title that hints at the lore surrounding the Seat of Infinity and the obsidianite deep within the mines. The Obsidian Hammer he carries is described as a brutalist chunk of obsidianite, profaned by the bloodshed that has taken place in these depths.

He is classified as a miniboss rather than a major story boss, so you won’t find a spirit summon available before his arena. This fight is just you, your Shell, and your weapons. The upside is that he is much more manageable than the Corrupted Gate bosses you may already have faced by this point, including tough fights like the Isaac the Scholar Prince fight in the Faded Citadel or the brutal two-health-bar encounter with the Malborn Offspring in the Unfound Path.

Prophet of Profane Infinities Overview

• Type: Miniboss (optional)
• Location: Obsidianite Mines, Ruins of Mammon
• Nearest Beacon: Outskirts of Mammon
• Spirit Summon: None available
• Reward: Obsidian Hammer (primary melee weapon)
• Required for: Lord of War trophy / achievement (all 8 weapons)
• Difficulty: Moderate — manageable once you read his attack timing

Where to Find the Prophet of Profane Infinities

The Prophet of Profane Infinities is found at the very end of the Obsidianite Mines dungeon, which sits in the Abandoned Slums area of the Ruins of Mammon. You reach the dungeon entrance from the Outskirts of Mammon Beacon. Here is the full route from that beacon to the boss arena.

Step-by-Step Route to the Obsidianite Mines

• Fast travel to the Outskirts of Mammon Beacon.
• Head west, past the small soldier camp near the ledge.
• Cross the rope bridge ahead — it leads into a larger siege camp area.
• Follow the path downward toward a group of miner enemies.
• You will find a Bone Gate at the end of that path. Interact with it to traverse the gap — this teleports you across the large chasm ahead.
• On the other side, look to your left to find the exit point of the Bone Gate.
• Run past the miners, then turn right.
• Cross the first rope bridge (guarded by an archer), then the second (guarded by an armored Stoner).
• Climb the stairs to the right of the Stoner’s location.
• You will arrive at a large mining complex. The entrance to the Obsidianite Mines dungeon is ahead in the central circular pit area.
• Drop into the water-filled quarry to enter the dungeon.

If you want to skip the route and just mark it on your map, the merchant Merrick at Marrow Keep sells an Obsidian Hammer location map for 1,300 coins.

Obsidianite Mines Dungeon Walkthrough

The Obsidianite Mines has a vertical layout and a couple of spots that can confuse you. Here is how to get through it cleanly.

• Enter the dungeon and take the elevator down into the mines.
• Pass through the tunnel past the miner enemy inside.
• You will reach a room that appears empty. Do not rush across it — pick up any items first. Then step into the center of the room. The wooden floor collapses and drops you down a level.
• From where you land, continue dropping to the lowest level. Take it one platform at a time so you don’t take heavy fall damage. You can press the light attack button mid-fall to reduce fall damage.
• At the bottom, follow the tunnel through. You will enter a large chasm room.
• Use the Obsidian platforms to cross the void room. Don’t drop to the bottom — the platforms are the intended path across.
• If you do drop to the bottom of the chasm, you’ll find two Dorsalite enemies and a Launch Pad to get back up.
• Once across, proceed into the boss arena. The Prophet of Profane Infinities is waiting at the end.

The dungeon is largely linear — there is only one path most of the way through. The main things to watch out for are the pickaxe-wielding Miner enemies inside. One solid hit from them while standing near a ledge can knock you off and add fall damage on top of the enemy damage. Take them carefully rather than rushing through.

How to Beat the Prophet of Profane Infinities

The Prophet of Profane Infinities fights exactly how you’d expect from a large hammer-wielding enemy. He is slow, hits hard, and leaves himself open after every swing. He doesn’t have fancy tricks, elemental damage, or multi-phase complications. The challenge is mostly about reading his timing and not getting caught by his high-damage hits if you are underleveled for this area.

The core loop is simple: watch the windup, dodge or parry, punish while he recovers, and back off. He stands still for a noticeable moment after each attack — that is your window to deal damage. Don’t try to chain long combos. Two or three hits and retreat is the safest rhythm.

General Strategy

• Don’t rush in: His attacks telegraph clearly with a slow windup. Wait for the swing to complete, then step in.
• Punish the recovery: After each swing, he pauses. That pause is your attack window. Land two or three hits then back off.
• Build the Break meter: Landing attacks and parrying his swings fills his yellow Break meter. When it fills, you can trigger a Riposte for a big chunk of damage. This is one of the fastest ways to end the fight.
• Stay mobile: He will occasionally close distance faster than his size suggests. Don’t stand still in front of him.
• Use ranged pressure: If you have a sidearm with an element applied, use it between his attacks. He has no shield and cannot block ranged hits, so fire damage or other Tarstone effects stack up well during the pauses.

Best Shell for This Fight

Tiel is the easiest choice for this encounter. His Shadow Dodge lets you time a perfect dodge on the hammer swing, turn invisible, and follow up with a Shadow Strike from behind. Because the Prophet swings slowly, the timing is very forgiving and Shadow Dodge is easy to land consistently. This approach makes the fight straightforward even if you are slightly underleveled for the area.

If you are not using Tiel, any Shell with comfortable parry timing works well here. The Prophet’s swings are slow and clearly telegraphed, which makes parrying much less risky than it would be against faster bosses. Build the Break meter through parries and land a Riposte when it fills. See our best shells for beginners guide if you are still deciding which Shell to use for Mammon.

Prophet of Profane Infinities Notable Attacks

• Overhead Hammer Slam: He lifts the hammer directly overhead and brings it down in front of him. Slow windup, easy to read. Dodge to either side and punish the recovery. This is the most common attack in the fight.
• Wide Horizontal Swing: A sweeping side swing across a broad arc. Dodge backward to clear the full range, or time a parry. He leaves himself open after this one for longer than most attacks.
• Forward Lunge Slam: He steps forward and drives the hammer into the ground. Has more forward reach than the basic overhead. Dodge to the side rather than backward to avoid the full area of impact.
• Short Combo Swing: Occasionally he chains two hits in quick succession. The second hit comes faster than the first so don’t commit to a punish after the first swing — wait for the full sequence to complete.

How to Prepare for the Obsidianite Mines

The Prophet himself is not the hardest part of this run for most players — the dungeon is. Dying to a miner enemy mid-dungeon means repeating the full route from outside. A few things that help:

• Upgrade your Shell and Harbinger first: Spend your Gloom before entering. More health and damage output make the dungeon enemies and the boss much easier to handle. This is especially important if this is your first time visiting this part of Mammon.
• Apply a Tarstone element: Coat your primary weapon or sidearm with fire or another Tarstone element before entering. The damage-over-time effect adds up during the pauses between the Prophet’s attacks. Our best Tarstones for beginners guide covers the best options.
• Come prepared with heals: The dungeon enemies do real damage, especially the armored ones on the rope bridges. Don’t arrive with depleted flasks.
• Know your weapon: The Prophet has decent health for a miniboss. Having a weapon you’ve upgraded through the Tarforge makes the fight noticeably shorter. Our best weapons for beginners guide and Tarforge upgrade guide can help here.

What Happens If You Die?

If you die during the dungeon or the boss fight, you respawn at the last Beacon you activated — most likely the Outskirts of Mammon Beacon. You will need to redo the entire route to the mines and clear the dungeon again before reaching the Prophet. There is no Beacon inside the Obsidianite Mines itself.

This is why it is worth clearing the dungeon carefully rather than rushing. The miner enemies inside can deal significant damage if you get caught in a tight spot near a ledge. Take them one at a time and don’t get greedy.

Prophet of Profane Infinities Reward — Obsidian Hammer

When you defeat the Prophet of Profane Infinities, you automatically receive the Obsidian Hammer. No loot drop to pick up — it goes directly into your inventory.

The Obsidian Hammer is Proxima’s signature melee weapon in Mortal Shell 2. It is the only heavy blunt weapon in the main arsenal and offers a playstyle very different from the faster sword-and-dagger options you may have been using through Fainweald and early Mammon. It deals strong damage, staggers enemies effectively, and has a versatile moveset despite its slow swing speed — similar to the Great Martyr’s Blade in pacing but with different attack patterns. It also accepts the Colossus Stone Tarstone, which is unique to this weapon among the main arsenal.

Picking up the Obsidian Hammer also counts toward the Lord of War trophy and achievement, which requires you to collect all eight primary melee weapons in the game. It is one of the four weapons you need to earn by defeating a boss or miniboss, alongside the Axatana, Clockwork Scythe, and Black Needle. See our complete all weapon and sidearm locations guide to track down the rest.

Once you have the Obsidian Hammer, you can take it straight to the Tarforge to start upgrading it. Higher upgrade tiers increase both its base damage and the effectiveness of any Tarstone you slot into it. Our Tarforge guide walks through the full upgrade system if you haven’t used it much yet.

Common Mistakes to Avoid

• Stepping into the center room without grabbing items first. The wooden floor collapses when you stand on it. Look around the room and pick up anything before triggering the drop.
• Falling straight to the bottom of the chasm. Drop from ledge to ledge rather than falling all the way down in one go. Taking too much fall damage here before the boss is unnecessary. Press light attack while falling to soften the impact.
• Committing to a long combo after his first swing in a two-hit sequence. He sometimes swings twice quickly. Hit two or three times after a complete sequence rather than chaining into a big combo after the first hit.
• Standing in front of him while healing. Even though he is slow, his attacks cover a wide area in front. Use his recovery windows to heal rather than trying to tank hits while drinking from your flask.
• Going in underleveled. This is a mid-to-late Mammon encounter. The enemies in the dungeon and the boss both hit hard if your Harbinger hasn’t been upgraded through the Gloom system. Spend your Gloom before entering.

Frequently Asked Questions