Last War Crystal Boss Event Guide: Unlock, Farming Tips, and Best Strategies
Last War: Survival has introduced one of its largest economy-focused updates in recent months with the arrival of the Crystal Event. This new feature combines three interconnected systems—the Crystal Factory, Crystal Shop, and Crystal Boss—into a single progression loop.
In this guide, we'll explain how to unlock the event, upgrade the Crystal Factory efficiently, earn and spend Amethyst Crystal, understand Crystal Boss mechanics, and build the most effective squads for maximizing damage.
Crystal Event Overview
The Crystal Event becomes available in two separate phases.
The Crystal Factory unlocks when your server reaches Season 1 Pre-Season Day 1 and your Base reaches Level 20. The Crystal Boss becomes available later, starting on Season 1 Day 1, while keeping the same Base Level 20 requirement.
Since access is tied to server progression rather than a global release schedule, servers that have already advanced beyond Season 1 will automatically meet the requirements. Once activated, the event remains available for 60 days.
The Crystal Factory continuously generates Amethyst Crystal, which can be exchanged for rewards in the Crystal Shop. Meanwhile, the Crystal Boss offers an additional source of Amethyst Crystal through combat and features its own achievement progression system. Because both systems contribute to the same currency pool, participating in both is the most efficient way to maximize rewards.
Crystal Factory Guide
After meeting the requirements, the Crystal Factory can be constructed through the Economy menu for a small amount of resources—roughly 60 Food and 60 Iron.
At Level 1, the factory passively generates around 4 Amethyst Crystal every few hours and can store up to 48 hours of production before reaching capacity.
Upgrading the factory improves both production speed and storage limits. However, upgrades require Crystal Ore, a special resource that cannot be obtained through regular gathering or construction mechanics.
How to Get Crystal Ore
Crystal Ore is currently obtained from:
- Daily Missions
- Daily Task Progress Chests
Unlike standard resources, Crystal Ore is unaffected by gathering bonuses, professions, or production boosts. The only reliable way to obtain more is by consistently completing daily activities.
Players who clear all Daily Task reward chests every day can significantly accelerate factory upgrades and gain access to Crystal Shop rewards much sooner than casual participants.
Crystal Shop Priority Guide
The Crystal Shop is accessed through the Crystal Factory interface and allows players to exchange Amethyst Crystal for several exclusive rewards.
Each item has a monthly purchase limit that resets on the first day of every month.
Is Silver Brick Worth Buying?
Silver Brick is often misunderstood by players because it is not a universal currency.
Instead, it can only be used for the special Silver Brick Packs available in:
- Bullseye Loot
- Glittering Market
- Bounty Hunter Hot Deal
These packs effectively replace some of the older low-cost paid bundles.
It's important to understand that purchasing Silver Bricks alone does not automatically grant event rewards. Players must still enter the corresponding event and spend the Silver Bricks there.
If you don't intend to participate in those events, Gold Bricks or the Weekly Pass Voucher generally offer better value.
For free-to-play players, however, Silver Bricks and Mobilization Coupons can unlock content that was previously restricted to spenders, making the Crystal Shop surprisingly F2P-friendly.
Crystal Boss Mechanics Explained
The Crystal Boss appears on the World Map from Monday through Saturday and remains active for approximately 23 hours each day.
Any Commander with a Level 20 Base can access the boss through the Crystal Boss menu, which also provides a shortcut for locating active bosses.
The encounter progresses through five fixed phases: Weapon -- Radar -- Chip -- Armor -- Core. Each phase features increasing durability and difficulty.
Crystal Boss Rules
Several special rules make this encounter different from standard world bosses:
- Only 3 attacks per day are available.
- Rally attacks are disabled.
- Every attack uses an individual troop dispatch.
- Troops cannot be recalled after deployment.
- Counter mechanics do not apply.
Many temporary combat buffs are also disabled, including:
- War Fever
- Charge Battle Flag
- Tactics Card active skills
- Season Military Rank bonuses
- Fish buffs
- PvE Tactics Cards
As a result, timing attacks around temporary boosts provides no benefit.
What Bonuses Still Work?
Two important damage bonuses remain active:
1.Defense Hero Bonuses
Certain Defense Heroes provide a direct damage increase to allied units when deployed. The list of eligible heroes can change, so checking the bonus panel before attacking is highly recommended.
2.Same Troop Type Bonus
Deploying five heroes of the same troop type grants an additional attack bonus.
This mechanic has led many high-level players to abandon traditional mixed-synergy teams. In many cases, a pure troop-type lineup deals significantly more damage than hybrid compositions because common synergy heroes such as Mason provide little value in this specific encounter.
Testing from multiple players has shown that replacing a qualifying Defense Hero with a synergy-focused hero can reduce damage output by hundreds of millions per attack.
Weekly Rewards and Achievement Progress
Weekly rewards are based on your highest single attack during the week.
Damage from multiple attempts does not accumulate toward reward thresholds.
This means one optimized attack is generally worth more than several mediocre runs.
1.Weekly Reward Milestones
Additional Amethyst Crystal rewards are granted for exceeding these milestones, although efficiency decreases at higher thresholds.
All unlocked phase rewards can be claimed together, and weekly progress resets every week.
2.Season Achievement Rewards
The Crystal Boss also includes season-wide achievements based on:
- Total attacks completed
- Total damage dealt
Attack milestones are set at:
- 15 attacks
- 30 attacks
- 60 attacks
- 100 attacks
- 140 attacks
Unlike weekly rewards, these achievements only reset at the end of the event season.
Players who consistently use all three daily attacks should comfortably complete the full reward track before the 60-day event ends.
Recommended Crystal Boss Teams
Current testing strongly favors running a full five-hero lineup of the same troop type.
Since many traditional synergy effects are disabled against the Crystal Boss, troop-type bonuses become far more important.
1.Tank Teams
A lineup centered around:
- Williams
- Murphy
- Kimberly
- Marshall
- Additional Defense Hero
has delivered solid results during early testing.
2.Missile Teams
Missile squads perform best when strong defensive heroes occupy the frontline while top damage dealers fill the remaining positions.
3.Aircraft Teams
Aircraft-focused teams built around Marshall have produced some of the highest reported damage numbers, with top players reaching 20–27 billion damage in a single attack.
Because external buffs are disabled, performance depends almost entirely on:
- Hero investment
- Equipment quality
- Troop-type bonuses
- Overall account strength
As a result, stronger accounts gain a significant advantage in Crystal Boss progression and weekly Amethyst Crystal income.
Frequently Asked Questions
1.Is the Crystal Boss worthwhile for free-to-play players?
Yes. Even if your damage output is limited, the Crystal Shop offers access to rewards such as Silver Bricks and Mobilization Coupons that were previously unavailable without spending.
2.Are Silver Bricks a general-purpose currency?
No. Silver Bricks can only be spent in the designated Silver Brick packs found in Bullseye Loot, Glittering Market, and Bounty Hunter events.
3.Can I use Rally attacks against the Crystal Boss?
No. Rally mechanics are disabled, and every attack must be launched individually.
4.Do weekly rewards count cumulative damage?
No. Only your highest single attack of the week determines your reward tier.
5.What should I do with unused Amethyst Crystal?
Because the Crystal Event is limited to 60 days, it's recommended to spend both Amethyst Crystal and Crystal Ore before the event concludes rather than leaving resources unused.