The Lonesome Spire, a significant tower situated south of the Deserted Slums in Mortal Shell 2, presents a new challenge filled with brigands, a dungeon, and a formidable boss. This guide details the steps required to navigate its entirety and complete the associated NPC questline.

Navigating the Lonesome Spire

Begin by conquering the Spoiled Mortuary. From the Gate of Mammon Beacon, ascend the steps to the right, leading to an area where you must defeat all brigands and wretches. Locate the dungeon entrance between the steps and the bridge, guarded by a Headsman. After defeating the guardian, descend via the elevator to find Laterite and proceed into the next chamber. Here, you will be ambushed by a Ravenous Flesh; dodge its initial attack and eliminate it. In the subsequent room, defeat another Flesh and loot the chest for a Coin of Mammon and a Gloombound Stone. Strike the inset wall on your left to reveal a throne containing a Dorsalite. With the Spoiled Mortuary cleared, return to the overworld.

Next, make your way to the Lonesome Spire Beacon. Return to the Gate of Mammon Beacon, rest if necessary, and descend the pathway through the archway. Take the right-hand path past the archway, which leads directly to the Lonesome Spire Beacon.

Before proceeding further into the Spire, it is advisable to speak with Vlas. If you have not already prompted his departure dialogue, rest at the Lonesome Spire Beacon, fast travel to the Outskirts of Mammon, and proceed to Vlas's camp. Exhaust his dialogue until he indicates he is moving on, then return to the Lonesome Spire Beacon.

Acquiring Key Items

To acquire the Unremarkable Key, return to the narrow route leading to the Beacon from the Gate of Mammon. Take the right-hand route down the slope, eliminating any Ravenous Fleshes encountered. Utilize the elevator you previously passed to ascend. Follow the wooden platform around the wall, collecting a Common Moonshine. Continue upwards, destroying crates for a Coin Pouch. Ascend the stone steps, loot the Common Moonshine, and destroy the adjacent wooden wall to find the Unremarkable Key and a Laterite. Descend the elevator and return to the Lonesome Spire Beacon.

To obtain the Splitting Stone, head between the two trees to your right from the Beacon. Turn left, then right up a slope, defeating the Headsman and Brigand Crossbowman. Ascend the steps to your left, kill the Armed Knave within the archway tunnel, and loot the Ventrium from the statue. Return down the steps, head past the cart, and ascend another set of steps. In the next room, defeat the Knave and two Brigands. Exit onto a balcony where a Brigand guards a chest containing the Splitting Stone.

Exploring the Spire's Circuit

Proceed into the next room and destroy crates blocking a doorway to find additional coin pouches. Continue through the rooms, defeating brigands. At a divergence, take the left-hand path through a doorway. Follow this path, eliminating a brigand and a knave. Go through the gap in the wall to emerge onto a platform circling the Spire. Here you will find an Armed Knave, a Coin Pouch, and on the ground level, a Headsman and a Subjugated Sentry. This path eventually leads back to the Lonesome Spire Beacon. Return to the room with the divergence and take the right-hand path. Defeat the Sentry and follow the path to confront a Knave and two Crossbowmen. Loot a Coin Pouch and proceed through the doorway. In the subsequent rooms, you will find a dungeon entrance. Before entering, the path ahead leads back to the starting area of the Spire circuit.

The Sentry's Grave Dungeon

Enter the Sentry's Grave dungeon. In the first room, defeat the two Subjugated Sentries, using one as cover from the other. Loot a Ventrium from behind the far Sentry. In the next corridor, eliminate two more Sentries. Break a wooden wall to find a Coin Pouch and descend steps. Defeat the two Brigands in the room and press the stone button to open a gate, allowing access to Wretches and a Ventrium. Take a left path partially up the steps and follow the grate-floor path, defeating Sentries. Before the next room, strike the right-hand wall to reveal a passage filled with iron maidens. Past the iron maidens, defeat two Sentries, loot a Dorsalite, and turn left to defeat another Sentry on a wooden platform, looting a Laterite. Return and proceed into the main room, turn left to defeat a Sentry, and enter the corridor beside it. Defeat the Brigand and the final Sentry around the corner. With the Sentries eliminated, proceed to the boss arena to face the Subjugated Guardian. Prioritize eliminating the two Sentries on the side ledges before engaging the boss. The Guardian's headbutt attack creates a shockwave; dodge backward instead of parrying. Upon defeating the boss, you will receive the Ballistazooka Sidearm.

Trading and Rescue

Exiting the dungeon, return to the room where you fought the Knave and Crossbowmen. Ascend the steps to the roof of the Lonesome Spire. Circumnavigate the roof clockwise to find a Dorsalite on a throne. Enter the central campsite to find a Brigand NPC who operates a shop. Here you can purchase items such as Tarspore, Burnt Effigy, Bloodseed, Galvanic Shard, Laterite, Dorsalite, and Glimpse.

After trading, speak with Vlas, who is held in a cage behind the Brigand. Give him the Unremarkable Key to free him. To progress the quest, reload the area by returning to the Lonesome Spire Beacon, resting, and then traveling back to the roof. The camp will be deserted. Return to the Beacon once more.

Finally, proceed to Marrow Keep. From the Beacon, take the right-hand doorway and find Vlas and Mutton near the Slayer Seal. Speak with Vlas to receive a Coin of Mammon as a reward. Vlas will remain in Marrow Keep, and Mutton can be found in various locations within the keep.

With the Lonesome Spire cleared, the next step is to return to the Gate of Mammon to tackle the Withered Shoals.