The Whiteout Survival Fire Crystal Infantry Camp is the advanced version of the regular Infantry Camp after Level 30. Upgrading it increases training capacity, reduces Infantry training time, adds building power, and strengthens your existing Infantry through Fire Crystal enhancements.
Infantry normally form the frontline of a march. Therefore, their durability affects how long your Lancers and Marksmen can continue dealing damage during rallies, garrison battles, fortress fights, Sunfire Castle, and State of Power.
This guide covers the complete Whiteout Survival Infantry Camp FC1-FC10 path, including resource costs, construction times, Furnace requirements, Crystal Skill milestones, Refined Fire Crystal costs, upgrade priorities, and common mistakes.
Upgrading the Infantry Camp from Level 30 to FC10 requires 5,215 Fire Crystals, 383 Refined Fire Crystals, 1.79 billion Meat, 1.79 billion Wood, 357 million Coal, and 88 million Iron. The combined base construction time is 104 days and 6 hours before buffs and Alliance Help.
What Is the Fire Crystal Infantry Camp?
The Fire Crystal Infantry Camp is a military training building used to develop Infantry after your normal camp reaches Level 30 and your state enters Fire Crystal progression.
Each upgrade provides several benefits:
- Higher training capacity: You can train more Infantry in a single queue.
- Faster training: Complete FC levels increase the building’s training-speed bonus.
- More building power: Every intermediate stage adds permanent city power.
- Stronger Infantry: Complete Fire Crystal levels apply additional troop stats.
- Crystal Skills: Important Infantry skills unlock or improve at FC3, FC5, FC8, and FC10.
- Furnace progression: Specific Infantry Camp levels are required for later Furnace milestones.
If your Infantry Camp is still below Level 30, review the regular Whiteout Survival Infantry Camp guide for standard building costs, troop tiers, and promotion milestones.
How Infantry Camp Fire Crystal Levels Work
The building does not move directly from Level 30 to FC1. Instead, every complete Fire Crystal level contains four intermediate stages and one final stage.
| Upgrade range | Required stages |
|---|---|
| Level 30 to FC1 | 30-1 → 30-2 → 30-3 → 30-4 → FC1 |
| FC1 to FC2 | FC1-1 → FC1-2 → FC1-3 → FC1-4 → FC2 |
| FC5 to FC6 | FC5-1 → FC5-2 → FC5-3 → FC5-4 → FC6 |
| FC9 to FC10 | FC9-1 → FC9-2 → FC9-3 → FC9-4 → FC10 |
Consequently, the material requirement shown for one sub-level is not the complete cost of reaching the next full tier.
For example, each stage from Level 30 to FC1 costs 59 Fire Crystals. Since five stages are required, the complete FC1 cost is 295 Fire Crystals.
Fire Crystal Infantry Camp Unlock Requirements
Before beginning Infantry Camp Fire Crystal upgrades, you need:
- A regular Infantry Camp at Level 30.
- Fire Crystal progression unlocked in your state.
- A Furnace at the FC level required by the target camp stage.
- Enough Meat, Wood, Coal, Iron, and Fire Crystals.
- Refined Fire Crystals beginning with FC5-1.
The Infantry Camp cannot advance beyond your current Furnace tier.
| Infantry Camp target | Required Furnace | Number of stages |
|---|---|---|
| FC1 | Furnace FC1 | 5 |
| FC2 | Furnace FC2 | 5 |
| FC3 | Furnace FC3 | 5 |
| FC4 | Furnace FC4 | 5 |
| FC5 | Furnace FC5 | 5 |
| FC6 | Furnace FC6 | 5 |
| FC7 | Furnace FC7 | 5 |
| FC8 | Furnace FC8 | 5 |
| FC9 | Furnace FC9 | 5 |
| FC10 | Furnace FC10 | 5 |
When Is Infantry Camp Required for Furnace Upgrades?
The Furnace rotates its military-building prerequisites between the Lancer, Infantry, and Marksman Camps.
Infantry Camp becomes a direct Furnace requirement at three major points:
| Furnace target | Required Infantry Camp | Other core prerequisite |
|---|---|---|
| Furnace FC3 | Infantry Camp FC2 | Embassy FC2 |
| Furnace FC6 | Infantry Camp FC5 | Embassy FC5 |
| Furnace FC9 | Infantry Camp FC8 | Embassy FC8 |
Therefore, Infantry Camp FC2, FC5, and FC8 are especially important progression milestones. Falling behind at these points will block your Furnace even when all Fire Crystal resources are ready.
Planning tip: Review the next level in the Fire Crystal Furnace guide before spending crystals on optional buildings. This helps you prepare the required Infantry Camp and Embassy in advance.
Whiteout Survival Infantry Camp FC1-FC10 Cost Chart
The following table shows the total cost of all five stages between each complete Fire Crystal level.
These costs apply only to the Infantry Camp. Furnace, Embassy, and other troop-camp upgrades require separate resources.
| Upgrade range | Meat | Wood | Coal | Iron | Fire Crystals | Refined FC | Base time | Final power |
|---|---|---|---|---|---|---|---|---|
| Level 30 → FC1 | 115M | 115M | 23.5M | 5.5M | 295 | 0 | 5d 6h | 362,100 |
| FC1 → FC2 | 125M | 125M | 25M | 6M | 355 | 0 | 6d 18h | 419,500 |
| FC2 → FC3 | 135M | 135M | 27.5M | 6.5M | 535 | 0 | 8d 6h | 476,900 |
| FC3 → FC4 | 140M | 140M | 28.5M | 7M | 630 | 0 | 9 days | 540,100 |
| FC4 → FC5 | 145M | 145M | 29.5M | 7M | 750 | 0 | 10d 12h | 603,300 |
| FC5 → FC6 | 165M | 165M | 33.5M | 8M | 405 | 25 | 11d 6h | 670,990 |
| FC6 → FC7 | 190M | 190M | 38M | 9.5M | 486 | 37 | 13d 12h | 738,500 |
| FC7 → FC8 | 230M | 230M | 46.5M | 11.5M | 486 | 55 | 15 days | 806,100 |
| FC8 → FC9 | 250M | 250M | 50M | 12.5M | 567 | 79 | 9d 18h | 878,500 |
| FC9 → FC10 | 295M | 295M | 55M | 14.5M | 706 | 187 | 15 days | 950,900 |
Construction times are base values. Research, State buffs, pets, Chief bonuses, hero effects, and Alliance Help can reduce the timer displayed in your city.
Total Infantry Camp Cost From Level 30 to FC10
| Resource | Total requirement |
|---|---|
| Meat | 1.79 billion |
| Wood | 1.79 billion |
| Coal | 357 million |
| Iron | 88 million |
| Fire Crystals | 5,215 |
| Refined Fire Crystals | 383 |
| Base construction time | 104 days and 6 hours |
| FC10 building power | 950,900 |
These totals cover only the Infantry Camp. Upgrading the Furnace, Embassy, Lancer Camp, and Marksman Camp will require additional resources and crystals.
How Fire Crystal Infantry Upgrades Work
Completing a full Fire Crystal level automatically applies the corresponding FC enhancement to eligible Infantry troops.
You do not need to promote each existing soldier separately to obtain its Fire Crystal level. When the appropriate Infantry Camp upgrade is complete, your Infantry receive the matching Fire Crystal troop bonuses.
The underlying troop tier remains connected to your regular Infantry progression. For example, an account using Tier 10 Apex Infantry can receive FC enhancements without those troops becoming Tier 11.
Important distinction: FC1-FC10 Infantry and T11 Helios Infantry are separate systems. Fire Crystal levels improve existing troops, while Helios Infantry must be unlocked through War Academy research.
Infantry Crystal Skill Milestones
Infantry Camp progression provides its biggest combat breakpoints at FC3, FC5, FC8, and FC10.
| FC level | Skill milestone | General effect |
|---|---|---|
| FC3 | Crystal Shield I | Introduces a chance to reduce or offset incoming damage |
| FC5 | Crystal Shield II | Improves the first Infantry Crystal Skill |
| FC8 | Body of Light I | Adds Infantry Defense and further protection when Crystal Shield activates |
| FC10 | Body of Light II | Strengthens the second Infantry Crystal Skill |
FC3 and FC5 are valuable early objectives because they unlock and strengthen the first defensive skill. Later, FC8 and FC10 provide another major improvement for endgame Infantry.
When Do Refined Fire Crystals Become Required?
Refined Fire Crystals first appear at FC5-1, which is the first intermediate step from FC5 toward FC6.
The first four FC5 intermediate stages each require:
- 33 million Meat
- 33 million Wood
- 6.7 million Coal
- 1.6 million Iron
- 90 Fire Crystals
- 4 Refined Fire Crystals
- 2 days and 6 hours of base construction time
The final FC6 stage uses the same normal resources and construction time. However, its special material cost changes to 45 Fire Crystals and 9 Refined Fire Crystals.
As a result, the complete FC5-to-FC6 upgrade costs 405 Fire Crystals and 25 Refined Fire Crystals.
Preparation tip: Begin saving Refined Fire Crystals before completing FC5. The total requirement rises from 25 for FC6 to 187 for the FC9-to-FC10 range.
Whiteout Survival FC8 Infantry Camp Requirements
To progress from Infantry Camp FC7 toward FC8, your Furnace must first reach FC8.
Each intermediate stage from FC7-1 through FC7-4 requires:
- 46 million Meat
- 46 million Wood
- 9.3 million Coal
- 2.3 million Iron
- 108 Fire Crystals
- 9 Refined Fire Crystals
- 3 days of base construction time
The final FC8 stage uses the same normal resources and timer. Its crystal requirement changes to 54 Fire Crystals and 19 Refined Fire Crystals.
The complete FC7-to-FC8 range costs:
- 230 million Meat
- 230 million Wood
- 46.5 million Coal
- 11.5 million Iron
- 486 Fire Crystals
- 55 Refined Fire Crystals
- 15 days of base construction time
FC8 is also a major combat milestone because it unlocks the second Infantry Crystal Skill and is required for progressing the Furnace toward FC9.
Whiteout Survival FC9 Infantry Camp Requirements
Progressing from Infantry Camp FC8 toward FC9 requires Furnace FC9.
Each intermediate stage from FC8-1 through FC8-4 costs:
- 50 million Meat
- 50 million Wood
- 10 million Coal
- 2.5 million Iron
- 126 Fire Crystals
- 13 Refined Fire Crystals
- 1 day, 22 hours, and 48 minutes of base construction time
The final FC9 stage uses the same normal resources and timer, but requires 63 Fire Crystals and 27 Refined Fire Crystals.
The complete FC8-to-FC9 cost is 567 Fire Crystals, 79 Refined Fire Crystals, and 9 days 18 hours of base construction time.
Whiteout Survival FC10 Infantry Camp Requirements
Progressing from Infantry Camp FC9 toward FC10 requires Furnace FC10.
Each intermediate stage from FC9-1 through FC9-4 requires:
- 59 million Meat
- 59 million Wood
- 11 million Coal
- 2.9 million Iron
- 157 Fire Crystals
- 31 Refined Fire Crystals
- 3 days of base construction time
The final FC10 stage uses the same normal resources and timer. However, it costs 78 Fire Crystals and 63 Refined Fire Crystals.
The complete FC9-to-FC10 path costs:
- 295 million Meat
- 295 million Wood
- 55 million Coal
- 14.5 million Iron
- 706 Fire Crystals
- 187 Refined Fire Crystals
- 15 days of base construction time
Completing FC10 raises the Infantry Camp’s building power to 950,900 and upgrades the second Infantry Crystal Skill.
Should You Prioritize the Fire Crystal Infantry Camp?
The Infantry Camp is a strong combat priority, but it should still be upgraded as part of a complete Furnace plan.
It becomes especially important when:
- Infantry Camp FC2 is needed for Furnace FC3.
- Infantry Camp FC5 is needed for Furnace FC6.
- Infantry Camp FC8 is needed for Furnace FC9.
- Your Infantry FC level is behind your Lancer and Marksman Camps.
- You are close to the FC3, FC5, FC8, or FC10 skill milestone.
- Your main march depends heavily on Infantry durability.
| Player situation | Recommended priority | Reason |
|---|---|---|
| Required for next Furnace tier | Very high | City progression cannot continue without it |
| Rally or garrison leader | High | Frontline durability affects the survival of the full formation |
| Active PvP player | High | Crystal Skills improve Infantry performance in repeated battles |
| Rally participant | Medium to high | Stronger troops improve the value of your rally contribution |
| Casual F2P player | Milestone-based | Protect crystals for mandatory Furnace and Embassy upgrades |
Best Infantry Camp Milestones
| Milestone | Priority | Why it matters |
|---|---|---|
| FC2 | High | Required for Furnace FC3 |
| FC3 | Very high | Unlocks the first Infantry Crystal Skill |
| FC5 | Very high | Upgrades the first skill and is required for Furnace FC6 |
| FC8 | Very high | Unlocks the second skill and is required for Furnace FC9 |
| FC10 | Endgame | Upgrades the second Infantry Crystal Skill |
Players with limited materials should aim to complete useful milestones rather than spending crystals on several isolated sub-levels across unrelated buildings.
Progressing the Furnace and all three troop camps through advanced Fire Crystal levels requires a substantial long-term resource commitment. Players comparing that path with a more developed starting point may review a wos account for sale, while checking the account’s state, Furnace tier, camp levels, transfer eligibility, heroes, troops, and remaining resources.
How to Improve Infantry Training Capacity and Speed
The camp’s Fire Crystal level is only one part of troop-training efficiency.
Research Camp Expansion
Camp Expansion in the Growth research tree increases the number of troops that can be placed in one training queue.
Research Training Tools
Training Tools reduces the time needed to train a group of troops. Its benefit combines with the training-speed bonus supplied by the camp.
Use Available Training Bonuses
Research, Alliance Technology, Chief appointments, pets, heroes, and temporary events may provide additional training bonuses. Review active effects before using a large number of speedups.
Keep the Queue Active
An upgraded camp provides little practical value while its training queue is empty. Use smaller batches when resources are limited, then reserve speedups for events that reward troop training.
Should You Train or Promote Infantry?
Promotion allows lower-tier Infantry to be upgraded to the highest standard troop tier currently available through your camp.
Promotion is useful when:
- You have large numbers of outdated Infantry.
- You already have enough total troops to fill your marches.
- An event rewards troop-power increases.
- You want to improve existing troops rather than add more low-tier units.
However, promotion does not always replace new training. Players still need enough total Infantry for multiple marches, reinforcements, rallies, garrisons, and casualty recovery.
| Current situation | Recommended action |
|---|---|
| Many low-tier Infantry | Promote toward the highest standard tier available |
| Not enough troops for marches | Train new Infantry before focusing entirely on promotion |
| Training event active | Compare the points awarded for promotion and direct training |
| Healing resources are low | Preserve enough resources for recovery before expanding the army |
Best Event Timing for Infantry Camp Upgrades
Fire Crystal camp upgrades may contribute points during building-power, construction, or preparation events. Therefore, timing a planned milestone around the correct scoring window can provide additional rewards.
A practical approach is:
- Calculate the cost of all five stages before the event begins.
- Activate available construction bonuses.
- Begin the upgrade during the relevant scoring phase.
- Request Alliance Help immediately.
- Wait for available helps before using general construction speedups.
- Combine the completed camp level with troop training when both activities earn points.
Nevertheless, do not delay an essential Furnace requirement for several weeks just to wait for a minor reward. Event timing should improve an upgrade that is already part of your progression plan.
F2P Fire Crystal Infantry Camp Strategy
Free-to-play players should manage Infantry upgrades around Furnace gates and Crystal Skill milestones.
A practical strategy includes:
- Keep the Furnace as the central progression target.
- Prepare Infantry Camp FC2, FC5, and FC8 before they block the Furnace.
- Push FC3, FC5, FC8, and FC10 when the skill milestone justifies the cost.
- Save enough Fire Crystals for the Embassy and other required buildings.
- Begin preparing Refined Fire Crystals before FC5-1.
- Keep Infantry, Lancer, and Marksman Camps reasonably balanced.
- Use construction bonuses and Alliance Help on every stage.
- Train troops consistently without exhausting healing resources.
Steady milestone-based progression is normally more efficient than rushing one camp and remaining blocked elsewhere.
Fire Crystal Infantry Camp Strategy for Spenders
Purchasing crystals can reduce waiting time, but it does not remove Furnace requirements or Refined Fire Crystal bottlenecks.
Before buying or spending materials, calculate:
- The remaining cost of all five Infantry Camp stages.
- The Fire Crystals required for the next Furnace tier.
- The cost of the matching Embassy requirement.
- The next Lancer and Marksman Camp milestones.
- Your current Refined Fire Crystal deficit.
- Construction and troop-training speedup requirements.
- The value of upcoming construction and training events.
Spending provides better value when it completes a defined city or combat milestone rather than one isolated intermediate level.
Common Fire Crystal Infantry Camp Mistakes
Counting Only One Sub-Level
Each complete FC tier requires five stages. Reaching FC1 costs 295 Fire Crystals in total, not 59.
Using the Wrong Refined Fire Crystal Total
The complete FC1-FC10 path requires 383 Refined Fire Crystals. FC7-to-FC8 alone costs 55 because the four intermediate stages require 9 each and the final FC8 stage requires 19.
Ignoring Furnace Prerequisites
The Infantry Camp cannot exceed the corresponding Furnace tier. In addition, FC2, FC5, and FC8 become requirements for later Furnace levels.
Assuming FC10 Unlocks Helios Infantry
Helios Infantry requires separate War Academy research. Fire Crystal camp levels and standard troop tiers are different systems.
Preparing Refined Fire Crystals Too Late
Refined Fire Crystals are first required at FC5-1. Their cost increases sharply at FC8, FC9, and FC10.
Upgrading Only Infantry
Infantry protect the formation, but Lancers and Marksmen still provide essential combat value. Letting the other camps fall too far behind creates an unbalanced army.
Forgetting Normal Resources
The Infantry Camp requires 1.79 billion Meat and 1.79 billion Wood from Level 30 to FC10. Fire Crystals are not the only bottleneck.
Starting Construction Without Bonuses
Activate construction bonuses before starting the timer. Applying them afterward may not reduce an upgrade already in progress.
FAQ
How do you unlock the Fire Crystal Infantry Camp?
Upgrade the regular Infantry Camp to Level 30, unlock Fire Crystal progression in your state, and reach the Furnace level required by the next camp stage.
How many Fire Crystals are needed from Level 30 to FC10?
The Infantry Camp requires 5,215 Fire Crystals and 383 Refined Fire Crystals from Level 30 to FC10.
Are existing Infantry upgraded automatically?
Yes. Completing each full Fire Crystal Infantry Camp level applies the corresponding FC enhancement to eligible existing Infantry without a separate Fire Crystal promotion.
What is the best early Infantry Camp milestone?
FC3 is a strong early goal because it unlocks the first Infantry Crystal Skill. FC5 later improves that skill.
When do Refined Fire Crystals become required?
They are first required at FC5-1, the first intermediate stage between FC5 and FC6.
What are the FC10 Infantry Camp costs?
The complete FC9-to-FC10 range costs 706 Fire Crystals, 187 Refined Fire Crystals, 295 million Meat, 295 million Wood, 55 million Coal, and 14.5 million Iron.
Does FC10 unlock Helios Infantry?
No. T11 Helios Infantry must be unlocked separately through the Infantry research branch in the War Academy.
When is Infantry Camp required for Furnace progression?
Infantry Camp FC2 is required for Furnace FC3, FC5 is required for Furnace FC6, and FC8 is required for Furnace FC9.
Conclusion
The Whiteout Survival Fire Crystal Infantry Camp is a major late-game military building that improves Infantry training, building power, Furnace progression, and frontline combat performance.
Reaching FC10 requires fifty construction stages, 5,215 Fire Crystals, 383 Refined Fire Crystals, 1.79 billion Meat, 1.79 billion Wood, and more than 104 days of base construction time.
For efficient progression, prepare Infantry Camp FC2, FC5, and FC8 before their corresponding Furnace gates. Additionally, aim for the Crystal Skill milestones at FC3, FC5, FC8, and FC10 rather than spending resources without a clear objective.
Finally, keep your three military camps balanced, activate construction bonuses before starting long timers, and prepare Refined Fire Crystals well before FC5-1. This approach strengthens your frontline without creating avoidable Furnace or resource bottlenecks.
Explore the Whiteout Survival guide category for more building, troop, resource, hero, and event guides.
