Lies of P: How to Solve the Mechanical Cryptic Vessel Quest

The Mechanical Cryptic Vessel is found in Arche Abbey Broken Rift, and the full solution is: loot it from the chest in that area, take it to Venigni at Hotel Krat for decoding, then travel to the Abandoned Apartment Stargazer, move through Collapsed Street, reach the merchant up the stairs beyond the archway, and speak to him while Frozen Feast is equipped. That final equipment check is the part most likely to stall the quest, and it matters more than the route itself once you have the vessel.

The only part with some source variation is the exact micro-path inside Broken Rift. Different guides describe the same chest route with slightly different turns, but they agree on the area, the stair descent, and the fact that you will fight through several enemies and at least one stronger encounter before reaching the chest.

What the Mechanical Cryptic Vessel actually does

The Mechanical Cryptic Vessel is not a weapon, Legion Arm part, or stat item. Its role in Lies of P is as a Cryptic Vessel collectible: you find it in the field, have it deciphered by Venigni, and then use the decoded clue to reach a hidden reward. In other words, its “performance” in the game is entirely as a quest key. If you are expecting an immediate combat upgrade from picking it up, that is not how this item works.

This matters because players often assume the hardest part is grabbing the vessel. It is only half the job. The treasure hunt does not advance until Venigni decodes it, and this specific vessel has a follow-up interaction that depends on the boss weapon Frozen Feast. Missing that detail can leave you standing in the right area with no obvious progress prompt.

• Pickup area: Arche Abbey Broken Rift
• Decode NPC: Venigni in Hotel Krat
• Follow-up area: Abandoned Apartment Stargazer into Collapsed Street
• Key trigger: Equip Frozen Feast before talking to the correct merchant
• Reward: Red Fox's Hunting Apparel and Quartz

How to get the Mechanical Cryptic Vessel in Arche Abbey Broken Rift

Start from the Arche Abbey Broken Rift Stargazer. Source descriptions differ slightly, but they line up on the same landmark chain: move forward from the Stargazer, continue through the open path or archway ahead, then take the route that bends right and leads down the stairs. The chest holding the Mechanical Cryptic Vessel is at the end of that enemy-filled stretch.

If one guide tells you “go straight, then right and downstairs” and another says “through the archway and down the stairs on the right,” treat those as two ways of describing the same progression. The important part is not a perfect turn-by-turn memory. It is recognizing that the chest is not hidden behind a puzzle or secret wall. It is placed at the end of a short but dangerous approach from Broken Rift.

Do not sprint to the chest unless the route is already clear. Lies of P is unforgiving during interaction animations, and this area is specifically noted for multiple enemies plus at least one elite encounter. If you try to force the loot while under pressure, the usual result is getting clipped out of the chest interaction, burning healing charges, or dying with no progress made. Clearing space first is faster than repeating the run.

If you are underleveled or simply tired of Arche Abbey attrition, use the layout to simplify the pull. Back enemies toward the stairs or wider ground instead of taking the fight in tighter forward space. The goal is not stylish combat here; it is reducing the chance of being sandwiched while moving toward the chest. Once the area is under control, open the chest and confirm the Mechanical Cryptic Vessel is in your inventory before warping out.

Why this pickup confuses people

The Vessel itself is straightforward once you know the route, but the game gives you a collectible with no immediate payoff. That creates a common false stop point: players find the item and assume the treasure step will update on its own. It will not. Cryptic Vessels in Lies of P need Venigni to interpret them, so the quest effectively has two different locations to remember: where you picked up the item and where you decode it.

There is also a second layer of confusion because later guides use slightly different landmarks for the treasure destination. The result is a quest that feels vague even when the overall structure is actually consistent. Once you separate it into four checkpoints-pickup, decode, travel, equipment trigger-the whole thing becomes much easier to manage.

Take it to Venigni before doing anything else

After looting the Mechanical Cryptic Vessel, return to Hotel Krat and speak with Venigni. He is the required NPC for decoding Cryptic Vessels. If you skip this step and head straight to the follow-up area, the merchant interaction will not make sense and the treasure hunt will appear broken even though it is not.

The practical check here is simple: do not leave Hotel Krat until the vessel has been deciphered and you have the decoded clue. If your first conversation with Venigni does not appear to advance the step, speak to him again and make sure you are not leaving with only the original vessel still unresolved. The decode is the bridge between the collectible and the reward.

Where the decoded clue sends you

Once the Mechanical Cryptic Vessel is decoded, the clue points you toward the Abandoned Apartment Stargazer side of the city. From there, move through Collapsed Street and keep following the path until you reach the archway and the stairs that lead up to the relevant merchant. Multiple sources agree on this overall destination even if their exact wording around side turns is not identical.

The best way to avoid wasting time is to ignore vague mental notes like “some merchant near a building.” A recurring warning in guides is that the target is not simply “the merchant in the house.” That phrasing has misled enough players that it is worth treating as a specific trap. Use the route markers instead: Abandoned Apartment → Collapsed Street → archway → stairs → merchant.

If you reach a merchant and nothing special happens, do not immediately assume the quest is bugged. First verify you are talking to the correct merchant in the correct path sequence, because that is the easier mistake to make. The second check is even more important, and it is the real gate on completion.

The Frozen Feast requirement is the key trigger

Before speaking to the merchant for the reward step, equip Frozen Feast. Multiple guides agree this is the essential trigger for completing the Mechanical Cryptic Vessel treasure hunt. Having the weapon elsewhere in your inventory is not the detail to trust here; the reliable instruction is to have it actively equipped when you start the conversation.

This is the step that makes the quest feel arbitrary if you are solving it blind. The game does not push you hard toward “wear the specific boss weapon before talking,” so it is easy to stand in the right spot with the right clue and still get no payoff. If the merchant interaction does not resolve correctly, unequip and re-equip Frozen Feast, then speak again.

There is one important caveat here. At least one video guide warns that if you already traded away or otherwise no longer have access to Frozen Feast, this vessel may be impossible to finish on that save. Written guides consistently support the weapon requirement, but they do not all independently confirm the lockout behavior. So the safest wording is this: treat Frozen Feast as mandatory, and if you no longer have it, expect a possible progression block even if community confirmation on that failure state is not fully settled.

Mechanical Cryptic Vessel rewards and why the quest is worth doing

The reward most consistently listed for this Cryptic Vessel is Red Fox's Hunting Apparel plus a Quartz. That makes the quest worth finishing even if you do not care much about collection completion. The apparel is the obvious cosmetic prize, while Quartz has real value because it feeds into character progression rather than just inventory padding.

That reward also explains the Vessel’s role in the wider game economy. This is not a lore trinket that exists only to fill a checklist. It is one of the “special treasure” style Cryptic Vessel hunts that ties exploration, NPC decoding, and gear-specific interaction together. In system terms, the Mechanical Cryptic Vessel performs as a multi-step treasure key with a tangible upgrade payoff at the end.

If the quest is not progressing, check these points in order

• You found the Vessel but nothing else happened: Go back to Venigni in Hotel Krat. The pickup alone does not complete anything.
• You decoded it but the merchant gives no reward: Make sure you are at the merchant reached from Abandoned Apartment through Collapsed Street, beyond the archway and up the stairs.
• You are at the right merchant and still stuck: Equip Frozen Feast before speaking. If needed, re-equip it and talk again.
• The route in Broken Rift is not matching the guide you read: Focus on the shared landmarks rather than exact wording. All reliable descriptions place the chest in the same Broken Rift path with a right-side stair descent.
• You no longer have Frozen Feast: There is some uncertainty here, but community guidance suggests the quest may be blocked on that save. If you cannot restore access to the weapon, do not assume there is a hidden alternate trigger.

For most players, the cleanest way to finish the Mechanical Cryptic Vessel is to think of it as a sequence rather than a scavenger hunt: secure the chest in Broken Rift, decode with Venigni immediately, warp to Abandoned Apartment, follow the Collapsed Street route to the correct merchant, and equip Frozen Feast before the conversation. If anything fails, the Frozen Feast check is the first thing worth revisiting.