Part of the Beasts & PvE Events Series:

Beginner Strategy Hub: Related reading.

Polar Terrors: Beasts Hunting Guide: Related reading.

Stamina Management: Beasts vs. Intel: Related reading.

Flame and Fangs is a recurring PvE event that runs through the Lighthouse Intel system. During the event window, qualifying Intel missions award an exclusive currency — Crystallite Cores — that you spend in a limited-time shop for Fire Crystals, Refined Fire Crystals, speedups, Hero EXP, and resource bundles.

The event looks simple on paper: do Intel missions, earn cores, buy things. Where it gets interesting is the interaction between mission caps, refresh windows, and Firebeast prioritisation. A player who understands the cap mechanics can pull roughly 168 cores in two days. A player who doesn't will leave a significant chunk of those on the table and wonder where the rewards went.

Quick Reference

Field	Value
Event structure	2-day earning window + 1-day redemption window
Event currency	Crystallite Core
Core earning rates	1 per Normal Intel, 10 per Firebeast Intel
Reported refresh times	00:00, 08:00, 16:00 server time
Reported regular Intel cap	8 unclaimed
Reported baseline yield	~168 cores over 2 days
Reported ceiling with carryover	~184 cores
Post-event conversion	10,000 Meat per unused core
Refined Fire Crystal cost	20 cores (state must have unlocked FC6)
Fire Crystals ×5 cost	5 cores

Event Timeline

The event splits into two distinct phases.

Earning Window (Days 1–2)

Crystallite Cores are awarded from qualifying Intel missions. This is the only period in which cores are generated. Every core you will earn across the entire event comes from these two days.

Redemption Window (Day 3)

No new cores are earned. The event shop stays open for spending whatever you have left in your inventory. Once the redemption window closes, any unspent Crystallite Cores are automatically converted into Meat — see End-of-Event Conversion below.

Event Cadence

The event is reported to recur approximately every two weeks. It frequently aligns with weeks tied to other state-wide events — State of Power, State vs State preparation, or King of Icefield. The exact day-of-week placement may vary between servers and game versions.

The in-game Lighthouse displays a 24-hour pre-event reminder, and that is currently the most reliable signal that Flame and Fangs is about to begin. Treat that notification as your trigger for pre-event preparation.

Core Mechanics

Crystallite Cores

Crystallite Cores are the event's exclusive currency. They are awarded only by qualifying Intel missions during the active earning window, and they have no use beyond the event shop and the post-event meat conversion.

Earning rates:

Mission Type	Crystallite Cores per Completion
Normal Intel	1
Firebeast Intel	10

The Firebeast — sometimes called "Firehunter" or "Fire Beast" in community materials, though the in-game UI uses "Firebeast" — is an event-specific Intel target that appears in the Lighthouse during Flame and Fangs. Firebeast missions are the primary lever for high core yield: a single Firebeast completion is worth ten Normal Intel missions.

End-of-Event Conversion

Any Crystallite Cores remaining in your inventory when the event closes are automatically converted into Meat at a rate of 10,000 Meat per unused core.

[!CAUTION] The meat conversion is a salvage floor, not a target. A 1M Meat bundle from the shop costs 30 cores and returns roughly 100× the meat per core compared to letting those cores expire. Almost any shop purchase beats the conversion rate.

Intel Mission System During the Event

Refresh Schedule

Intel missions are reported to refresh at three fixed server times per day: 00:00, 08:00, and 16:00 server time. Each refresh adds new missions to the Lighthouse pool. Missions that have already spawned and remain unclaimed are not removed by a refresh — they accumulate until they hit the cap.

Mission Cap

The Lighthouse has a reported cap of 8 unclaimed regular Intel missions at any given time. Once this cap is reached, no further regular Intel missions will spawn until you clear some out by completing or refusing them.

[!IMPORTANT] Firebeast missions are tracked separately and follow their own refresh logic. They are not subject to the regular Intel cap.

This cap is the single most important mechanic for maximising rewards. Letting unclaimed regulars sit at cap wastes future spawns with no way to recover them.

Refresh Composition

A typical refresh is reported to deliver around 8 regular Intel missions plus 2 Firebeast missions, though the exact split per refresh has not been definitively documented and may vary.

Where the Yield Comes From

Under the reported 8+2 composition, each refresh delivers approximately:

8 Normal Intel × 1 core = 8 cores
2 Firebeast Intel × 10 cores = 20 cores
Total per refresh: ~28 cores

Across the 2-day earning window with three refreshes per day (six total refreshes), this gives the reported baseline of ~168 cores.

Here's the breakdown that should shape every decision you make:

Source	Reported Contribution	Share of Baseline
Firebeast Intel	~120 cores	~71%
Normal Intel	~48 cores	~29%

Firebeast missions account for roughly seven out of every ten cores. This is why Firebeast handling dominates the optimisation problem — and why missing even a single Firebeast hurts far more than letting a full set of regulars sit.

The Event Shop

Access Requirements

Basic shop access requires only that the event is active and you have at least one Crystallite Core. Purchasing Refined Fire Crystals is gated to states that have unlocked Furnace Crystal level 6 (FC6) at the state level — your own furnace does not need to be FC5+ to buy Refined Fire Crystals, provided your state has unlocked FC6.

[!NOTE] The in-game shop displays this restriction explicitly. Check your state's Furnace Crystal unlock level before the event begins so you can plan allocation accordingly.

Verified Shop Items and Costs

Item	Cost (Cores)	Notes
Refined Fire Crystal	20	State must have unlocked FC6
Fire Crystals (×5 bundle)	5	No state-level gating

Reported Shop Items and Costs

The remaining items are visible in the event shop, but their exact costs and purchase limits have shifted between event iterations. Reported values for the current iteration:

Item	Reported Cost (Cores)	Reported Limit
1h Research Speedup (×2 bundle)	4	5
1h Construction Speedup (×2 bundle)	4	5
1h Training Speedup (×2 bundle)	4	5
10K Hero EXP	3	15
1M Meat	1	30
1M Wood	1	30
100K Coal	1	30
10K Iron	1	30

[!WARNING] Treat these costs and limits as a working reference and verify against the in-game shop at the start of each event — values have been adjusted between iterations.

Purchase Limits in Flux

Two specific items have had reported limit changes between iterations:

Refined Fire Crystals: Reported limits have ranged from 2 to 5 between event versions.
Fire Crystals (×5 bundle): Reported limits have ranged from 5 to 6.

Always confirm the active limits in-game before planning your spend.

Per-Core Value Analysis

Comparing what each spend option returns per single Crystallite Core:

Spend Option	Output per Core Spent	Notes
Fire Crystals (×5)	1 Fire Crystal	Highest density of basic Fire Crystals
1h Speedups	~30 minutes (reported)	Equal across Research/Construction/Training
10K Hero EXP	~3,333 Hero EXP (reported)	—
1M Meat	1,000,000 Meat (reported)	~100× the post-event meat conversion floor
1M Wood	1,000,000 Wood (reported)	—
100K Coal	100,000 Coal (reported)	—
10K Iron	10,000 Iron (reported)	—
Refined Fire Crystal	1 Refined per 20 cores	Highest single sink; FC6 gate
Unspent (post-event)	10,000 Meat	Salvage floor

Two takeaways drive most spending decisions:

The salvage floor is far below every shop option. A core spent on a 1M Meat bundle returns roughly 100× the meat you'd get by letting that core convert at the end of the event. Almost any shop purchase beats letting cores expire.
Refined Fire Crystals are the largest single sink (20 cores each) but also the highest single-purchase value for FC6+ states actively progressing Furnace Crystals. The opportunity cost of one Refined Fire Crystal is 4 Fire Crystal (×5) bundles, or roughly 5 Hero EXP purchases, or 5 Speedup bundles, or 20 resource bundles.

Total Cost to Clear the Shop

Clearing every shop item to its current limit is reported to require somewhere in the range of 255–295 Crystallite Cores, depending on whether Refined Fire Crystals are included and which iteration's limits are active. With a baseline yield of ~168 cores (or ~184 with carryover), most players cannot clear the shop in a single event and must prioritise.

Maximising Crystallite Core Yield

Pre-Event Preparation Checklist

In the 24 hours before the event opens — the in-game 24-hour Lighthouse reminder is your trigger:

Begin completing Intel missions but leave their rewards unclaimed. Completed-but-unclaimed Intel persists in the Lighthouse and reportedly converts to Crystallite Core rewards once the event begins. This carryover is reported to add roughly 16 cores over the baseline.
Avoid skill-based mission-generation exploits. Certain Hero-skill interactions that previously allowed Intel mission stockpiling have reportedly been adjusted to share standard Intel cap rules. Treat any skill-based stockpiling as a bonus rather than a planned multiplier.
Confirm your state's Furnace Crystal unlock level. This determines whether Refined Fire Crystals (the highest-value single sink) are available to you. Pre-FC6 states should plan a different allocation — see Shop Purchase Priorities.
Note your server-time refresh windows. Plan which of the three daily refreshes (00:00, 08:00, 16:00 server time) you will catch reliably.
Pause Intel cooldown items if you use them. Saving them for the event window means you can chain Firebeast clears without waiting on standard cooldowns.

[!TIP] The carryover prep is the single highest-impact action for minimal effort. Sixteen extra cores from pre-completed Intel costs you nothing but awareness of the event schedule.

Daily Routines by Play Frequency

Realistic yield depends heavily on how often you can clear the Lighthouse during the earning window. Three reasonable routines:

Active player (three logins per day, aligned to refresh windows). Clear all queued regulars and Firebeasts at each refresh. Expect close to the full ~168 baseline plus carryover.

Moderate player (two logins per day, ideally bracketing the longest offline gap). The dominant Firebeast yield (~71% of baseline) is largely preserved provided you clear Firebeasts whenever you log in. Some regular Intel yield is lost to cap-blocking on the missed refresh, but the impact is bounded — the regular contribution is only ~29% of baseline to begin with.

Minimal player (one login per day). Significant yield loss from cap-blocked regulars across multiple refreshes. When the Lighthouse is full, prioritise clearing Firebeast slots over regulars, as a single Firebeast is worth ten regulars. Carryover prep becomes proportionally more valuable here.

[!IMPORTANT] In all cases: when both regular and Firebeast missions are queued, clear Firebeasts first.

Refresh Discipline

Because the cap blocks new regular spawns at 8 unclaimed missions, the cost of letting missions sit is foregone refreshes. Practical discipline:

Clear the Lighthouse before each refresh window where possible. This ensures the next refresh has a full complement of empty slots to fill.
If you cannot be online for all three refreshes, at minimum clear before your longest offline window — you cannot prevent the missed refresh from happening, but you can prevent the next refresh from being cap-blocked.
Keep at least 2–3 regular mission slots open during the earning window to absorb spawns from in-progress refreshes.

Firebeast Prioritisation

Firebeast missions yield 10× a Normal Intel mission and account for the majority of total event yield. Two practical implications:

Avoid letting a Firebeast mission expire or sit untouched. If your Lighthouse is full and a Firebeast appears, clear regulars immediately to free up attention.
If your play time is limited, focus Firebeasts. A single Firebeast clear is worth more than a full standard refresh of normals. One missed Firebeast costs more than letting all eight regulars sit unclaimed for one refresh cycle.

Shop Purchase Priorities

With most players unable to clear the shop in a single event, allocation matters. Optimal priorities differ by state-level Furnace Crystal unlock.

FC6+ States

Refined Fire Crystals to limit. Highest per-core value for players actively progressing Furnace Crystal upgrades.
Fire Crystals (×5 bundle) to limit. Highest density of basic Fire Crystals per core spent.
10K Hero EXP to limit if actively levelling heroes; otherwise deprioritise.
Speedup bundles if in an active development phase; deprioritise if stockpiling for SvS or KvK preheat.
Resource bundles (Meat / Wood / Coal / Iron) as overflow once primary items are at limit. Still meaningfully better than the meat conversion floor.

Pre-FC6 States

Refined Fire Crystals are unavailable. Promote everything else by one rank:

Fire Crystals (×5 bundle) to limit.
10K Hero EXP to limit if actively levelling heroes.
Speedup bundles for active development.
Resource bundles as overflow.

During the Redemption Window

Confirm Refined Fire Crystals (if eligible) and Fire Crystal bundles are at their purchase limit first, then move down the priority list. Never leave high-value items unpurchased to lock in a meat conversion — every shop tier outperforms the conversion floor.

Edge Cases

A few situations that change the standard playbook:

State unlocks FC6 mid-event. Refined Fire Crystals become available the moment the unlock registers. Recheck the shop after the unlock and redirect remaining cores accordingly.

You join the event late. Carryover prep is already lost. Treat the remainder as a partial event and run the moderate or minimal routine appropriate to the time remaining. Firebeast prioritisation matters more, not less, in compressed windows.

Event overlaps with SvS prep or KvK preheat. Speedup bundles compete with your stockpile strategy. If you are actively hoarding speedups, deprioritise them in favour of Fire Crystals and Hero EXP — both are harder to acquire elsewhere at comparable rates.

You have leftover cores entering the redemption window. Recheck shop limits before topping up resource bundles — some iterations have raised limits, and there may be unpurchased capacity in items you assumed were maxed.

Hero skill effects that generate Intel missions. Reported behaviour has been adjusted; do not plan around skill-based stockpiling as a primary multiplier.

Common Mistakes

Treating the meat conversion as the goal. At 10K Meat per unused core, the conversion is a salvage floor. A 1M Meat bundle returns roughly 100× that per core spent.
Letting the regular Intel cap block refreshes. Eight unclaimed regulars sitting in the Lighthouse means subsequent refreshes spawn no new regulars until you clear slots. Every blocked refresh is yield permanently lost.
Clearing regulars before Firebeasts. Firebeasts are worth 10× a regular each and contribute the majority of total yield. They are cleared first when both are available — always.
Ignoring the FC6 gate when planning. Pre-FC6 states cannot buy Refined Fire Crystals, which significantly changes optimal core allocation. Plan the spend in advance, not during the redemption window.
Assuming shop limits are stable. Reported limits for Refined Fire Crystals and Fire Crystal bundles have shifted between iterations. Verify in-game before committing a spend plan.
Treating carryover as guaranteed. The pre-event carryover behaviour is a documented player pattern, not an enforced game feature. It is currently reliable but is not a mechanic you should depend on across patches.

FAQ

How many Crystallite Cores can I earn in a single event? The reported baseline is ~168 cores across the 2-day earning window, with an additional ~16 from pre-event carryover if you prepare correctly, bringing the ceiling to roughly 184.

What happens to unspent cores? They convert to Meat at 10,000 per core when the event closes. This is significantly worse than any shop purchase.

Do I need FC6 personally to buy Refined Fire Crystals? No. Your state needs to have unlocked FC6. Your personal furnace level does not gate the purchase.

How often does Flame and Fangs run? Approximately every two weeks, though exact scheduling varies by server. The Lighthouse's 24-hour reminder is the most reliable advance notice.

Should I save cores for a future event? Cores do not carry over between events. Spend everything before the redemption window closes — unspent cores convert to meat at the salvage rate.

Is it worth buying resource bundles? Yes. Even the lowest-tier resource bundle (1M Meat for 1 core) returns 100× the meat conversion floor. Resource bundles are the correct overflow purchase after higher-priority items are maxed.

Key Takeaways

Firebeast missions are everything. At 10 cores each, they account for ~71% of your total yield. Never let one expire while regulars sit in your Lighthouse.
The Intel cap is your enemy. Eight unclaimed regulars block all future regular spawns. Clear before every refresh window you can reach.
Pre-event carryover is free yield. Complete Intel missions before the event starts but leave rewards unclaimed for a reported ~16 core bonus.
Every shop purchase beats the conversion floor. Letting cores expire at 10K Meat is the worst possible outcome. Spend everything.
FC6 status determines your priority list. Refined Fire Crystals are the highest single sink at 20 cores — if your state has FC6, they are your first purchase. If not, Fire Crystal bundles lead.
Verify shop limits every iteration. Limits have changed between events. What was capped at 2 last time might be capped at 5 this time.

Related Handbook Guides:

Whiteout Survival Flame and Fangs Guide [2026]: Rewards & Best Strategy