The Crystal Factory in Last War Survival is a special production building connected to the Crystal Event. Its main purpose is to continuously produce Amethyst Crystal, which can then be exchanged for rewards through the Crystal Shop.
The building has a simple progression loop: complete Daily Tasks to obtain Crystal Ore, spend that Ore upgrading the Crystal Factory, collect the Amethyst Crystal it produces, and use the currency in the Crystal Shop. Because higher factory levels generate more Amethyst over time, upgrading early is generally more valuable than holding Crystal Ore without a specific reason.
Build the Crystal Factory as soon as it becomes available, complete all Daily Task progress chests for Crystal Ore, and upgrade the building early. Production continues while you are offline, but it eventually reaches a storage cap, so collect regularly.
How to Unlock the Crystal Factory
The Crystal Factory becomes available when two conditions are met:
- Your server has reached Day 1 of the Season 1 Pre-Season or later.
- Your Base has reached Level 20 or higher.
These requirements are tied to server progression rather than requiring your server to currently be in Season 1. Servers that have already progressed beyond that stage also meet the lifecycle requirement.
Once unlocked, the building can be placed through the Economy building menu. The initial construction is inexpensive and quick compared with its later upgrades, so delaying the first build provides little benefit.
What Does the Crystal Factory Produce?
The Crystal Factory produces Amethyst Crystal automatically, including while you are offline. Amethyst Crystal is the currency used inside the Crystal Shop.
At Level 1, the Factory produces 4 Amethyst Crystal every three hours. Its output rises as the building is upgraded, eventually reaching 90 every three hours at Level 20.
| Factory Level | Amethyst Crystal per 3 Hours | Approx. Daily Output |
|---|---|---|
| 1 | 4 | 32 |
| 5 | 20 | 160 |
| 10 | 40 | 320 |
| 15 | 60 | 480 |
| 16 | 66 | 528 |
| 17 | 72 | 576 |
| 18 | 78 | 624 |
| 19 | 84 | 672 |
| 20 | 90 | 720 |
The production difference becomes significant over many days. This is why early Factory upgrades matter: every hour spent at a higher level generates more currency for the remaining duration of the Crystal Event.
Crystal Factory Storage and Production Cap
Amethyst Crystal does not accumulate forever. The Factory has a maximum production window, after which it needs to be collected before additional production can continue accumulating.
At Level 1, the maximum production window is 48 hours. Upgrading the Factory increases this limit alongside its production rate.
The longer capacity makes the building forgiving for players who cannot log in several times per day, but there is still no advantage to leaving a full Factory uncollected.
You do not need to collect every three hours. You do need to collect before the Factory reaches its maximum production window. Once storage is capped, additional passive production is effectively being wasted.
How to Get Crystal Ore
Crystal Ore is the main upgrade material for the Crystal Factory. It comes from the progress chests earned through Daily Tasks during the Crystal Event.
| Daily Task Chest | Crystal Ore |
|---|---|
| 1st Progress Chest | 600 |
| 2nd Progress Chest | 1,000 |
| 3rd Progress Chest | 1,200 |
| 4th Progress Chest | 1,600 |
| 5th Progress Chest | 2,000 |
| Daily Total | 6,400 |
Collecting all five progress chests therefore provides 6,400 Crystal Ore per day under the current event structure. This is enough to progress the Factory rapidly during its earliest levels.
Can You Increase Crystal Ore With Profession Skills?
No. Crystal Ore from Daily Tasks is not increased by the One More profession skill, and building resource-reduction effects do not reduce the Crystal Ore requirement for Factory upgrades under the current system.
This makes Daily Task completion the main bottleneck. Missing an entire day’s progress chests is harder to compensate for than delaying an ordinary resource-building upgrade.
How to Upgrade the Crystal Factory Efficiently
The best general strategy is to spend Crystal Ore on Factory progression reasonably soon after earning it. Unlike a consumable that provides a one-time reward, a Factory upgrade increases every future production cycle.
The first upgrade from Level 1 to Level 2 requires 2,000 Crystal Ore and increases production from 4 to 8 Amethyst Crystal every three hours. Costs then rise through the later levels.
Priority 1: Complete Daily Tasks
Daily Task progress chests determine how quickly you can advance the Factory. If you want to maximize the building, completing all five chests should become part of your daily routine while Crystal Ore is available.
Priority 2: Upgrade Early Instead of Hoarding Ore
Holding enough Ore for a planned upgrade is fine, but stockpiling it for no purpose reduces your long-term Amethyst production. Earlier upgrades have more time to repay their cost through increased output.
Priority 3: Collect Amethyst Consistently
You do not need to constantly monitor the Factory. Simply establish a collection routine that prevents it from hitting its production cap.
Treat Crystal Ore as a production investment. Daily Tasks supply the Ore, Factory upgrades increase future Amethyst income, and regular collection prevents that increased production from being lost to the storage cap.
What Is Amethyst Crystal Used For?
Amethyst Crystal is spent through the Crystal Shop, which is accessed as part of the Crystal Factory system. Current reward options include items such as:
- Gold Bricks
- Silver Bricks
- Diamonds
- Weekly Pass [Take All] Vouchers
- Mobilization-related vouchers
The shop uses purchase limits, with its current redemption limits refreshing on the first day of each month.
Because rewards have different uses, there is no universal purchase order for every account. Check what each reward does before exchanging a large Amethyst balance, particularly specialized currencies such as Silver Bricks.
How the Crystal Boss Connects to the Factory
The Crystal Factory is also the central access point for the wider Crystal Event, including the Crystal Boss.
The Factory becomes available during the Season 1 Pre-Season, while the Crystal Boss unlocks from Day 1 of Season 1 for eligible Level 20+ Bases. Under the current event rules, the Boss appears from Monday through Saturday and allows up to three individual challenges per day.
Crystal Boss participation provides another source of Amethyst Crystal, so players trying to maximize Crystal Shop currency should use both systems rather than relying entirely on passive Factory production.
Best Daily Crystal Factory Routine
- Complete enough Daily Tasks to open all progress chests.
- Claim the available Crystal Ore.
- Upgrade the Crystal Factory whenever you have enough Ore.
- Collect produced Amethyst Crystal before the Factory reaches its cap.
- Check the Crystal Shop before monthly purchase limits reset.
- Use Crystal Boss attempts when that feature is available on your server.
- Check the live event timer and rules regularly.
Common Crystal Factory Mistakes
- Building it late: Every delayed upgrade reduces how long you benefit from the higher production rate.
- Skipping Daily Tasks: Crystal Ore is tied directly to Daily Task progress chests.
- Hoarding Crystal Ore unnecessarily: Unspent Ore produces nothing, while an upgraded Factory continuously generates more Amethyst.
- Letting production cap: A full Factory cannot make use of additional offline production time.
- Expecting profession bonuses to increase Crystal Ore: The special event resource is not affected by the usual relevant bonuses.
- Ignoring the Crystal Boss: Passive production is only one way to earn Amethyst Crystal.
- Spending Amethyst without checking shop limits: Some rewards are limited and those limits reset periodically.
- Assuming every server has the feature: Both Base level and server lifecycle progression affect availability.
How Long Does the Crystal Factory Last?
Current Crystal Event information describes the event as having a limited availability window, with recent versions showing a 60-day duration. Because the feature was introduced recently and event presentation can vary by version or server, use the countdown displayed in your own Event Center as the final authority.
If your event shows an expiration timer, avoid finishing the event with large unused amounts of Crystal Ore or Amethyst Crystal. Check the current in-game rules for how remaining event resources are handled when your version closes.
Is the Crystal Factory Worth Upgrading?
Yes, if the Crystal Event is active on your account and you are completing the Daily Tasks that supply Crystal Ore. The Factory turns an event-specific material into a continuing source of shop currency rather than a one-time reward.
The main reason to upgrade is time. Higher production earlier in the event means more Amethyst generated throughout the remaining production period. There is little benefit to deliberately keeping the Factory at a low level while unused Crystal Ore sits in your inventory.
Optional Faster Starting Point
Players who would rather begin from a more developed account can browse Last War accounts for sale on Heaven Guardian. When comparing accounts, check Base level, server progression, heroes, Drone development, and unlocked event systems rather than relying only on total displayed power.
FAQs
When does the Crystal Factory unlock?
The Factory unlocks once your Base reaches Level 20 and your server has reached Day 1 of the Season 1 Pre-Season or later.
What does the Crystal Factory produce?
It continuously produces Amethyst Crystal, the main currency used in the Crystal Shop.
Does the Crystal Factory produce while offline?
Yes. Production continues while you are offline until the building reaches its maximum production capacity.
How do you get Crystal Ore?
Crystal Ore comes from Daily Task progress chests while the Crystal Event is active. Completing all five current daily progress chests provides 6,400 Crystal Ore.
Should I save Crystal Ore or upgrade immediately?
Upgrading early is generally more efficient because every additional Factory level increases the amount of Amethyst Crystal generated during future production cycles.
What is the maximum Crystal Factory level?
The current Crystal Factory progression table runs through Level 20, where production reaches 90 Amethyst Crystal every three hours. Event systems can be adjusted in future updates, so check the current building interface if additional levels are introduced.
What is Amethyst Crystal used for?
Amethyst Crystal is exchanged in the Crystal Shop for rewards such as Diamonds, Gold Bricks, Silver Bricks, vouchers, and other event items.
Is the Crystal Factory connected to the Crystal Boss?
Yes. The Factory acts as the central entry point for the Crystal Event systems. The Factory provides passive Amethyst production, while Crystal Boss challenges provide another route to Crystal-related rewards.
Can profession skills reduce Crystal Factory upgrade costs?
Current rules do not allow the relevant profession skills to increase Crystal Ore income or reduce the Crystal Ore required for Factory upgrades.
Conclusion
The Last War Crystal Factory is primarily an efficiency building. Complete Daily Tasks to secure Crystal Ore, spend that Ore on upgrades early, and collect your Amethyst Crystal before production reaches its cap. The earlier the Factory reaches higher levels, the longer you benefit from its increased output.
Remember that the Factory is only one part of the Crystal Event. Use the Crystal Shop carefully, take advantage of Crystal Boss opportunities when they unlock, and pay attention to the event timer and server-specific rules so event resources are not wasted.
For more building advice, event walkthroughs, and progression strategies, explore our additional Last War Survival guides.
