Buyan Antique Store

Buyan Antique Store is a Shop ran by Ginger in Failume Heights.

Although called a Shop, Buyan does not actually sell any goods. Instead, it serves as a Game System to record items found inside several Lemnian Hollow locations. Much like Yum Cha Sin, there are also several Commissions that players can undertake.

Details

Explore the unknown, uncover Buyan's secrets.

The Buyan store gathers hidden relics from ages past. Explore the Lemnian Hollow to find various collectibles, complete Collection Missions, earn Mystery Points, raise your Mystery Level, and claim generous rewards.

The secrets you uncover are logged in the Mystery Database, available to review anytime.

Mystery Rank

Mystery Points ×2000 are required per level.

Badge	Level	Reward	Badge	Level	Reward
	1	—		8	Polychrome 60 Original Chip 10 Denny 5000
	2	Polychrome 60 Original Chip 10 Denny 5000		9	Polychrome 60 Senior Investigator Log 3 Denny 5000
	3	Polychrome 60 Senior Investigator Log 3 Denny 5000		10	Polychrome 60 Original Chip 10 Denny 5000
	4	Polychrome 60 Original Chip 10 Denny 5000		11	Polychrome 60 Senior Investigator Log 3 Denny 5000
	5	Polychrome 60 Senior Investigator Log 3 Denny 5000		12	Polychrome 60 Original Chip 10 Denny 5000
	6	Polychrome 60 Original Chip 10 Denny 5000		13	Polychrome 60 Senior Investigator Log 3 Denny 5000
	7	Polychrome 60 Senior Investigator Log 3 Denny 5000		14	Bangboo System Widget 3 Denny 20,000
	8	Polychrome 60 Original Chip 10 Denny 5000		15	Title 1 Bangboo System Widget 3 Denny 20,000

Side Mission

Client	Request	Description	Rewards
Miner in Distress	Earth's Glow	Brilliant hope lies buried beneath the soil — luminous stones from the earth first emerges after ages... A miner has sent out a distress signal. Go check out what's happening.	Inter-Knot Credit 225 Polychrome 15 Denny 7500
Perplexed Engineer	The Night of the Power Outage	In the depths of night, the howls of Ethereals and cries of rebels echo. Darkness of the Hollow has shrouded this place ever since... The factory has fallen into the shadows. Talk to the workers here to learn what happened.	Inter-Knot Credit 225 Polychrome 15 Denny 7500
Dazed Investigator	Before Dawn	The sword and shield in hand, and the compass that guides the way, have evolved through space and time. What remains unchanged is the courage and sacrifice of the pioneers... A hesitant investigator lingers here — go learn what he knows.	Inter-Knot Credit 225 Polychrome 15 Denny 7500

Collection Mission

Dusty Old Coin

Task	Reward	Task	Reward
Collect 10 Dusty Old Coins	Mystery Points 1000 W-Engine Power Supply 2	Collect 40 Dusty Old Coins	Mystery Points 1000 W-Engine Power Supply 2
Collect 20 Dusty Old Coins	Mystery Points 1000 W-Engine Power Supply 2	Collect 60 Dusty Old Coins	Mystery Points 1200 W-Engine Power Supply 2
Collect 30 Dusty Old Coins	Mystery Points 1000 W-Engine Power Supply 2	Collect all 86 Dusty Old Coins	Mystery Points 1200 W-Engine Power Supply 2

Collection Mission

Task	Reward	Task	Reward
Collect all Collectibles in "To Be Fuel for the Night"	Mystery Points 1800 W-Engine Power Supply 2	Collect 5 Collectibles	Mystery Points 500 W-Engine Power Supply 2
Collect 10 Collectibles	Mystery Points 500 W-Engine Power Supply 2	Collect all Collectibles in "Echoes of Bygone Waves"	Mystery Points 1800 W-Engine Power Supply 2
Collect all Collectibles in "The Radiant Forge"	Mystery Points 1800 W-Engine Power Supply 2	Collect all Collectibles in "Light of the Earth"	Mystery Points 1800 W-Engine Power Supply 2
Collect 15 Collectibles	Mystery Points 500 W-Engine Power Supply 2	Collect 20 Collectibles	Mystery Points 500 W-Engine Power Supply 2
Collect 30 Collectibles	Mystery Points 500 W-Engine Power Supply 2

Mystery Database

Echoes of Bygone Waves

Name	Type	Content	Location
Lumite Ore Refinement Log I	Document	Experiment Content: Physical characteristics of refined Lumite Ore extract (also known as Porcelume). Objective: To verify the stability and safety of the refined Lumite Ore extract. Researchers: Felix, Sergey Experiment Log: Under standard laboratory lighting, the extract showed extremely high reflectivity. For future optical experiments, protective eyewear is advised. (Sergey comments this really suits the name Lady Sunbringer gave it, Porcelume.) The extract shows strong insulating properties, good malleability, is noncombustible, withstands high temperatures, and behaves with marked inertness in the majority of reaction tests. Early evaluation suggests it is a highly stable nonmetal.	(Hollow) Old Port Factory
First Research Institute: Researcher Hiring Announcement	Document	Given the expanded scope of the First Research Institute's new projects, as well as the growing needs of Hollow exploration and production in the settlements, we aim to recruit three people as researchers and research assistants. Research Fields: Materials science (theory and applications), advanced computing technologies, and AI framework theory. Job Duties: Assist Lady Sunbringer and the core project team in completing their research tasks. Requirements: A solid theoretical foundation and academic background related to the chosen research field. No criminal record. Applicants with a strong aptitude for Ether are preferred. Priority consideration for Intelligent Constructs. Applicants must pass a written exam before moving on to the interview stage.	(Hollow) Old Port Factory
Lumite Ore Refinement Log II	Document	Experiment Content: Reactivity of refined Lumite Ore extract (also known as Porcelume) with Ether. Objective: To test how the refined Lumite Ore extract reacts with Ether and explore its potential applications in Hollow exploration. Researchers: Svetlana, Felix Experiment Log: The extract proved extremely inert to common energy sources such as photonic and electrical energy, and showed minimal change even when subjected to intense energetic impact. However, it showed exceptionally strong absorption toward Ether inside and outside Hollows. A single unit of extract can take in Ether equivalent to ■■ units of a standard Ether medium. Yet the Ether absorbed is difficult to release, making it unsuitable for energy storage. Furthermore, pharmaceuticals refined by Lady Sunbringer using the extract as the primary material were able to markedly reduce — and sometimes cure — symptoms in patients suffering from Ether Corruption. Initial findings suggest it can react efficiently with Ether within the human body.	(Hollow) Old Port Factory
Using the AI Assistant "Nite"	Document	First Research Institute – "Night-IV" Intelligent Research Assistant Usage Manual (Special Edition) Written by: Sergey "Night-IV" is the fourth iteration of "Nite," though we have continued to affectionately call her just Nite. Her core code was written personally by Lady Sunbringer — an otherworldly language no one else can understand. If you ever get any wild ideas about modifying the core database, please visit Lady Sunbringer's office to apply for top-level editing access. You can call for Nite from anywhere in the institute that has a connected audio receiver — as long as you say her name clearly. We're currently working on tuning Nite's voice-recognition module so she can understand the wide range of accents used by humans, Thirens, and Intelligent Constructs. Nite can respond to most inquiries about foundational theory, equations, theorems, and basic emotional support. But please refrain from sharing too much personal information; aside from avoiding database contamination, Nite's design also means we cannot offer any strong privacy guarantees.	(Hollow) Old Port Factory
Lumite Ore Refinement Log III	Document	Experiment Content: Porcelume Materials Study Objective: Exploring potential applications of Porcelume. Researchers: Sergey Experiment Log: Porcelume possesses incredible hardness and resilience. I've already used a short blade made from it to slice through a 5 mm steel plate, a 2 cm rock layer, the forelimbs of two Ethereals, a laboratory microscope, and Felix's ■■■■. The cut surface is smoother than anything produced by alloy blades. And the blade shows absolutely no signs of Ether Corruption. Standard alloys would've suffered metal fatigue long before my battle with those two Ethereals. (Supervisor's note: researchers are strictly forbidden from engaging in frontline combat — annotated by Felix.) Whether as a weapon material, an equipment coating, or drill head for ore extraction, Porcelumes would be the ideal choice — assuming we can solve the problem of its low production yield.	(Hollow) Old Port Factory
Research Memo: Ether Vacuum	Document	For most living beings, Ether is essentially a toxin. Yet it's precisely the trace amounts of Ether dispersed in the air that allow humans to develop an aptitude for Ether and function safely, to a limited degree, inside the Hollows. Experiments confirm that Porcelume can absorb Ether with extremely high efficiency, and under certain conditions can create a localized "Ether Vacuum." Within this zone, standard Ether control breaks down, and Ethereals instinctively avoid it. This explains why Porcelume-based gear can effectively defend against Ether Corruption, but it also raises a new concern: workers who operate long-term within an Ether Vacuum are gradually losing their aptitude for Ether. Porcelume gives us an umbrella — but it may also take away our ability to walk in the rain.	(Hollow) Old Port Factory
Shiny Recipe	Audio Recording	▶ ...Once the chicken is stewed until tender, add freshly washed vegetables, untainted by any Hollow contamination, into the pot. And for the finishing touch, sprinkle in a pinch of Porcelume powder! ▶ And just like that, a delicious, nutritious Porcelume soup that boosts your immune system is ready to serve! ▶ I recorded this recipe on the recorder. If you can't remember how to make it, just play it back and you'll know what to do! ▶ Ugh... Dad, don't fall for their nonsense about healthy living, okay? ▶ Putting aside whether you'd get sick if you put Porcelume straight into your mouth... ▶ It's not even really Porcelume powder! It's just left overs from polishing Lumite ore!	(Hollow) Old Port Factory
Porcelume Factory Three Safety Guidelines	Audio Recording	▶ Thanks to everyone's combined efforts, production at Factory three is back on track. Fellow workers, while we celebrate this progress, Lady Sunbringer once again reminds us of the importance of safety: always remember the three core principles of safe production, stay diligent in your duties, strictly manage the duration of Hollow operations, and pay close attention to fire safety within the factory and mining areas to prevent accidents before they happen... (static noise) ▶ The eastern factory has been attacked by Ethereals. Please stay away from the Miasma and other corrupted substances! Wear Porcelume anti-corruption gear at all times and in the event of an Ethereal attack, seek shelter in nearby buildings and wait for rescue from a security team... (static noise)	(Hollow) Old Port Factory
Lost Beast	Audio Recording	▶ How did that big fella end up in Lemnian Hollow?! Isn't it a military mech? ▶ Who knows? Maybe it's from the last military operation in Waifei Peninsula... Or maybe it came in through some fissure... ▶ We've been in this line of work long enough. Nothing should surprise us anymore. ▶ Dammit! If I make it out of here alive, I'm getting a new job for sure! ▶ Gonna wait tables over at Lumina Square? I'll be sure to give you a good tip~ ▶ If I actually survive this, you can have multiple tips! ▶ I'll hold you to it!	(Hollow) Old Port Factory
Earth's Glow - Echo	Echo	▶ It's Lumite ore! There's a new vein down there! We found it... I found it! ▶ Huh... You were complaining about the conditions in the mines two months ago, but now you're a workaholic? ▶ C—Come on, don't mess with me... Porcelume can really save people's lives! ▶ It's fascinating. They look like nothing more than pretty, shiny stones, but they seem to be able to stave off every Ether-borne illness... ▶ After installing components made from Porcelume, our equipment's much more durable, and everyone's Corruption symptoms have subsided. ▶ With our lord and Lady Sunbringer leading us... we... the children, maybe... we really do stand a chance!	(Hollow) Old Port Factory
Mortal - Echo	Echo	▶ Don't you think... Lady Sunbringer can be a little... scary sometimes? ▶ Heh, why would you think that? Whenever people talk about Lady Sunbringer, they always describe her as wise, kind, and approachable, don't they? ▶ Sure, but... her knowledge of the Hollows is almost too extensive, don't you think? ▶ And every time a Hollow shifts, she somehow finds a new exit almost instantly! ▶ But whenever we ask her what the trick is, she keeps changing the subject, with that same sad look on her face. ▶ Do you really think we humans can... ▶ Shut up, Sergey! Stop talking nonsense! ▶ If she's a goddess, worship her! If she's a demon, worship her with fear!	(Hollow) Old Port Factory

The Radiant Forge

Name	Type	Content	Location
Torn-Up Journal	Document	...Everything fell apart. We wanted to smash the machines that were swallowing our lives, but when the moment came to bring the hammer down, all we felt was confusion. Porcelume itself isn't the problem — it's healed people, protected us. The fault lies with those who use it, with the endless production quotas that never stop. We destroyed the production line, but we also destroyed our weapon supply for the next few months. I don't know if we did the right thing... I only know we couldn't keep living like that anymore.	(Hollow) Porcelume Processing Base
Incident Report	Document	Analysis of the Overload Incident in Power Sector Seven's Porcelume Core Indicent Summary: The Porcelume panel responsible for stabilizing the energy core was subjected to prolonged overload. The Ether stored inside exceeded its tolerance limit, causing structural resonance and resulting in partial meltdown of the core chamber. Root Cause: Porcelume absorbs Ether efficiently, but the absorbed Ether does not dissipate — it remains stored in an unknown state. When too much accumulates, its physical behavior can shift unpredictably. Preventive Measures: All Porcelume energy systems must include Ether concentration sensors and enforce strict operating thresholds. Porcelume's stability is not infinite.	(Hollow) Porcelume Processing Base
Porcelume Factory 3 Management Handbook	Document	The output and quality of Porcelume are what keep Factory Three alive. It's the only true measure of our value. The settlement's safety and prosperity rest in our hands — especially yours, the frontline managers of Factory Three. Hard work is a virtue; idleness is a sin. Lumite ore, shining like the sun, should be gathered by our diligent workers at dawn and delivered at dusk into baskets brimming with the glowing fruits of victory. From ■■:00 in the morning to ■■:00 in the evening, this has been our golden work standard, set to balance real operational needs with the safety of our workers. However, due to recent disruptions in production at Factories Two and Four caused by Ethereal interference, and in light of the current state of rebellion, the Lord has ordered the work schedule be adjusted to 06:00–20:00.	(Hollow) Porcelume Processing Base
Flyer Left in the Factory Corner	Document	Do You Know What You're Working For? (Title in Bold) The Lumite ore you dig up every day becomes weapons for the Lord's Command, gear for the guards, and bonuses for the factory managers. And what about us? We work around the clock, yet even Porcelume gear can't shield us from the nonstop Corruption sickness. Have you ever seen a worker corrupted by Ether? I have, my father was one of them. They told us he was in a "safe position," but now he can't even remember his own name. We're not "workers" to them — we're disposable parts. If you're tired of this too, leave a mark on the east side of Factory Three during the night shift.	(Hollow) Porcelume Processing Base
Porcelume Factory Three Work Rules	Audio Recording	▶ Recently, some personnel in a few departments have shown signs of poor motivation and deliberate idleness. The Lord regards this issue with the utmost concern and has issued stern criticism. We once again stress the importance of maintaining production discipline within factory three... ▶ The production and quality of Porcelume are the very lifeblood of factory three. It is the only measure of our worth. The safety and prosperity of the settlement rests in our hands. Let no one harm the collective interest for selfish reasons... ▶ Under the Lord's guidance and courage, we shall build a beautiful...	(Hollow) Porcelume Processing Base
Warrant	Audio Recording	▶ The following fugitives have been identified as wanted targets: former Captain of the Second Guard, Leonid Antonov; Head of Plant One, Yulia Goryacheva; former Technical Director, Sun... ▶ Anyone with knowledge of these individuals or other fugitives, please contact the Lord's Command or any member of the local First Guard. Command shall reward those who provide valuable intel... ▶ Those who contact or assist wanted individuals will be regarded as traitors.	(Hollow) Porcelume Processing Base
The Night of the Power Outage - Echo	Echo	▶ It's so dark... I can't see anything... ▶ When's the power gonna be fixed? Isn't the engineer here yet? ▶ Huh? What's that noise? ▶ It's coming from the factory to the west... Are the workers there smashing up their equipment? ▶ Ugh... after we only just managed to get that production line running again... ▶ But, maybe there's nothing we can do... Those factories and machines were all built by the workers, piece by piece... ▶ The Lord's so desperate for quick results, everyone's been overwhelmed... ▶ Th—That sound... Is that Ethereals? ▶ Am I... really gonna make it out of here alive?	(Hollow) Porcelume Processing Base

Light of the Earth

Name	Type	Content	Location
Anomaly Case Report	Document	Case ID: HC-P02 Following treatment with Porcelume medication, the patient's Ether Corruption symptoms eased significantly, and overall physical function improved. However, later observation revealed that the patient developed antibodies targeting Porcelume micro-particles, resulting in rejection, high fever and luminescent rashes upon renewed contact with Porcelume products. It is suspected that while Porcelume "heals" the Corruption, its nature as a potent foreign substance may cause it to be identified and attacked by the human immune system. This phenomenon currently occurs in fewer than 0.3% of cases, but vigilance is advised. Long-term follow-up is recommended for all treated patients.	(Hollow) Lumite Mine
Safety Notice to All Workers of Factory 3	Document	Recently, several longtime workers in the refining workshop have shown varying degrees of "Porcelume Lung" — lung fibrosis caused by inhaling excessive Porcelume dust. Although Porcelume itself is non-toxic, its microcrystalline structure can accumulate in the lungs, physically blocking alveolar Ether exchange and leading to chronic dry cough and breathing difficulty. Effective immediately, all positions that handle Porcelume powder must strictly use the Research Center's newly designed protective respirators. Your health is the settlement's most valuable asset.	(Hollow) Lumite Mine
Order to Limit Public Distribution of Porcelume	Document	Recent investigations have uncovered unauthorized smelting and processing of raw Lumite ore, with individuals privately crafting Porcelume amulets, ornaments, and similar items. Not only does this waste critical strategic resources, but the lack of proper refinement methods has already led to multiple incidents caused by wearing or using Porcelume objects saturated with Ether. Effective immediately, the First Guard is ordered to seize all non-official Porcelume products and strictly prevent any raw Lumite ore from leaving the mining zone. The future of this settlement cannot be sacrificed to ignorance and greed.	(Hollow) Lumite Mine
Warrant	Document	The following defectors have been listed as top-priority fugitives: Former Captain of the Second Guard, Leonid Antonov. Head of Plant One, Yulia Goryacheva. Former Chief Technical Director, ■■■■. The Lord's Command has obtained substantial evidence that these individuals engaged in acts of treason that harmed the collective interest, including but not limited to directing attacks on production facilities in Factory One and Factory Three, inciting mutiny within the Second Guard, and stealing critical research. Anyone with information regarding wanted individuals or other defectors must immediately contact the Lord's Command or any nearby First Guard personnel. Substantial rewards will be granted for providing actionable intelligence. Those who privately contact or assist wanted individuals will be treated as defectors themselves.	(Hollow) Lumite Mine
Unsent Letter Home	Document	Katya, today deep in the tunnels, I found another wall of Lumite ore shining like a starry sky. I hid a small, brightest piece in my pocket, hoping to place it by your bedside when I get home. You don't cough from the Miasma anymore, and nothing matters more than that. The work is hard, and the hours are long, but whenever I think of what Lady Sunbringer said about "the children's future," it all feels worth it. Listen to your mother. When U next get time off, I'll take you to that beach where you can't see the Hollows.	(Hollow) Lumite Mine
Operation Log I-03	Audio Recording	▶ Accessing operation log 01-03, Lemnian Second Vanguard Squad. ▶ Everyone who passed through this area went missing, including the previous squad that was sent here to investigate... ▶ Maybe there's a powerful Ethereal lurking inside... We're only responsible for investigating the perimeter. Lady Sunbringer will handle it in no time once she gets back. ▶ An Ethereal... We've been here for days and haven't seen a single one. We haven't even seen any signs of corruption... ▶ It's as if something in the central area is devouring everything — not just life, but even the Ether itself... ▶ Maybe it's just a huge fissure we haven't discovered yet... ▶ Stop lying to yourself! Something's not right about this place!	(Hollow) Lumite Mine
Sunbringer	Audio Recording	▶ ...Why didn't you stop Lady Sunbringer!? ▶ Because she said she... she'd take care of it. She'd calm the Hollow down... ▶ No matter how strong she is, how could she deal with the Hollow on her own! ▶ Don't tell me you actually buy their nonsense — that she caused the disaster? ▶ No...! I don't!	(Hollow) Lumite Mine
Before Dawn - Echo	Echo	▶ This is... the Fifth Vanguard squad. I'm... Elena. ▶ Led by Lady Sunbringer, we found an incredibly pure Porcelume vein... ▶ I'm looking at a massive crater here, it's a miraculous sight... ▶ Giant rocks of Lumite ore were floating above the crater, blocking the sun, but the vein shone brightly, illuminating even the bottom of the pit like daylight. ▶ A collapse... a huge tremor. Whether it was a sudden geological change... or a large-scale Hollow disaster... I couldn't tell. ▶ The squad got separated. I was knocked out by the blast, and when I came to, I was already in the pit — not sure if that's good luck or bad. ▶ The entrance to the pit has been buried... and the recording device I was carrying was also damaged in the impact. I don't know if it was crushed or corrupted by the Miasma... ▶ Then why are you still talking to yourself, Elena? Hoping someone's gonna hear you? ▶ Haha... poor little Elena. ▶ Lady Sunbringer... Help me... Help us.	(Hollow) Lumite Mine
First Light - Echo	Echo	▶ Such a large piece of Lumite ore... Just touching it gives me a sense of comfort. ▶ How did you even find these stones? What, you thought they looked nice and dug one up to keep? ▶ My mom says Lady Sunbringer came to our first camp with a shiny piece of Porcelume. ▶ She used medicine made from Porcelume powder to heal a few people who suffered from Corruption, and then she was instantly treated by the lord as an honored guest. ▶ Since then, we've followed both the Lord and Lady Sunbringer to reach the present day...	(Hollow) Lumite Mine

To Be Fuel for the Night

Name	Type	Content	Location
Let Them Descend - Echo	Echo	▶ I see. You want to make Them descend. ▶ I'll do it. ▶ As long as... succeeds, I'll join you in that audience before Them. ▶ Now is the most opportune moment. Wouldn't you agree? ▶ Even if it means staining my hands with blood, I have to...	During To Be Fuel for the Night
About the "Weapon" - Echo	Echo	▶ The cost of that "weapon"... will always be so heavy. ▶ But this is for the greater good... For the last spark of humanity... ▶ Someone has to make that choice. I know.	During "To Be Fuel for the Night"
Unspoken - Echo	Echo	▶ Salvation, or destruction... ▶ Belle, Wise... my precious children. By the time you learn the truth, I'll probably be long gone. ▶ But you two... you will survive.	During "To Be Fuel for the Night"
Minimal Cost - Echo	Echo	▶ You know why. For those two kids, I have to do it. ▶ It's the only way to pay the least in exchange for the greatest... ▶ I know. I know what you mean, I do — but...	During "To Be Fuel for the Night"
Repent - Echo	Echo	▶ ...So that's the reason... appeared at... ▶ I see. You... Eridu... ▶ ...Was the beginning of everything... I saw... endless possibilities, and... an end that could devour everything. ▶ You're wrong... if... those children... I have no regrets... ▶ ...What comes next... will become a terrible catastrophe... loss of countless lives... ▶ Ha... I wonder how I'll be remembered in Eridu's history... As someone who brought... ▶ ...A lunatic with bloodstained hands...	During "To Be Fuel for the Night"

Trivia

• Buyan has another branch in Lumina Square that cannot be interacted with. The owner of that store is an old acquaintance of Yixuan's.^[1]

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Change History

References

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