Last updated: October 12, 2026
What the Frost Evolution Event Actually Demands
In Catch a Monster, the Frost Evolution Event converts Frostwyrm into Avalanchewyrm through a multi-stage evolution chain gated by event currency, a specific location, and a survivable taming attempt. The direct answer: farm Frozen Shards in the Glacier Hollow biome until you hit the 250-shard requirement, hold a Glacial Core from the event boss, then evolve Frostwyrm at the Frost Altar during the event window only, because the altar rejects the request outside it. The single biggest time-saver is capturing Frostwyrm with a Chilled Lureball rather than a standard one, which roughly cuts your capture attempts per spawn from six or seven down to one or two.
Quick Comparison: Routes to Avalanchewyrm
See also: Granblue Fantasy GBF Tier List: Best Characters • Fish It Elpirate Gran Maja Guide: Location & Tips
Three routes get you there, and they differ mainly in how much real-world time you spend versus how many event currency items you burn.
| Route | Best for | Key requirements | Typical time | Currency cost |
|---|---|---|---|---|
| Direct evolution (Frostwyrm → Avalanchewyrm) | Players with an existing Frostwyrm and a stockpile of Glacial Cores | 1 Frostwyrm, 250 Frozen Shards, 3 Glacial Cores, Frost Altar access | 25–45 min | 250 shards, 3 cores |
| Full chain (Frostling → Frostwyrm → Avalanchewyrm) | New event players with no evolved starter | Base form capture, 400 Frozen Shards total, 4 Glacial Cores | 2–4 hours | 400 shards, 4 cores |
| Boss-farm route (repeat Glacier Hollow clears) | Players who cannot reliably catch wild Frostwyrm spawns | Full party, 6–8 boss clears, event altar access | 3–5 hours | No wild captures needed |
Best Overall: The Direct Evolution Route
If you already own a Frostwyrm — whether from a prior event or a wild spawn — this is the route to take. It suits players who have cleared the event at least once and are chasing the Avalanchewyrm’s stat profile rather than the novelty of the chain.
- Step 1 — Load up on Frozen Shards. According to the event’s in-game patch notes, Frozen Shards drop from ice-type wild spawns in Glacier Hollow. The drop rate is higher per encounter in the inner basin than the outer ridge, so path inward rather than circling the entrance. Reason: the outer ridge spawns share shard drops with common ore nodes, diluting your rate.
- Step 2 — Bank 250 shards before touching the altar. Partial deposits are not stored; the altar consumes the full 250 in one transaction. Reason: dying mid-attempt wipes pending progress, not the shards you have already banked in inventory.
- Step 3 — Clear the event boss for three Glacial Cores. Each boss clear yields one core, and the event does not award more than one per run regardless of damage dealt. Reason: triple-clearing is the only confirmed way to reach the three-core threshold; nobody has reported a skip.
- Step 4 — Evolve at the Frost Altar. The altar sits in the northern ruin cluster of Glacier Hollow and only accepts evolutions during the active event window. Reason: outside the window the altar renders as scenery, giving no interaction prompt.
Trade-off: it is fast but heavily dependent on already owning the base monster. If you don’t, you’re paying for the full chain with time instead of effort.
Best for Newcomers: The Full Chain
Starting from Frostling costs roughly 150 extra shards and one extra Glacial Core over the direct route. It suits anyone who missed the last event cycle and has no eligible Frostwyrm in storage.
The chain runs Frostling → Frostwyrm → Avalanchewyrm, with the first evolution requiring 150 shards and one core, and the second requiring the same 250/3 split as above. Burn the cheaper evolution first; the altar processes one evolution per interaction, so queuing both at once fails and costs you nothing but the walk back.
Best for Struggling Catchers: The Boss-Farm Route
If wild Frostwyrm spawns keep fleeing before your ball connects, ignore them. Repeated event boss clears award Glacial Cores and a chunk of shards per run, which tops up your total without a single capture attempt. This route is slower and combat-heavy, but it removes the RNG that frustrates new players. It suits parties of two or more; solo clears are possible but stretch the time estimate above considerably.
How to Choose Your Route (With Numbers)
Work out the gap between what you own and what the altar demands, then pick the cheapest way to close it.
- You own Frostwyrm and 250+ shards: run the boss three times for cores and evolve immediately. Total extra work: three clears.
- You own Frostwyrm, no shards: farm roughly 60–70 wild ice spawns in the inner basin at an assumed 3–4 shards per spawn. That’s about 40 minutes at a steady pace.
- You own nothing: budget 2–4 hours. Frostling’s first evolution costs 150 shards and a core, so you need 400 shards and four cores in total.
- Your capture rate is below one in five: use the boss route. Assuming 6–8 clears at 8–10 minutes each, that’s under 90 minutes of combat, and you never risk losing shards to a failed capture.
One maintenance reality worth knowing: the Frost Altar is a shared world object, so on crowded servers the interaction prompt can be claimed by another player mid-animation. Your shards are only consumed when the evolution animation completes. If it aborts, your inventory is untouched — re-approach and try again rather than panic-farming replacements.
Common Mistakes That Cost Event Currency
- Using standard Lureballs on Frostwyrm. Per the in-game capture tuning notes, ice-type monsters resist standard balls for the first few throws. A Chilled Lureball hits the same catch tier with far fewer attempts.
- Farming the outer ridge. Lower shard yield per encounter and more competition from other players on the same spawn nodes.
- Evolving with pending shards in the altar. The altar clears its queue on failure, so bank everything in inventory first.
- Ignoring the event window. The altar is inert outside it; players who bank all their materials and then miss the window have to wait for the next cycle with no partial credit.
Frequently Asked Questions
How many Frozen Shards does the Frostwyrm to Avalanchewyrm evolution need?
The final evolution costs 250 Frozen Shards plus three Glacial Cores, consumed in a single altar interaction. If you are also evolving from Frostling, add 150 shards and one core for the first step, bringing your full-chain total to 400 shards and four cores.
Can I evolve Frostwyrm outside the Frost Evolution Event?
No. The Frost Altar only accepts evolutions while the event window is active, and outside that window it has no interaction prompt at all. Bank your shards and cores beforehand, then evolve as soon as the event opens rather than spending the first hours farming.
Where do Glacial Cores come from?
Glacial Cores drop from the event boss, one per successful clear. The drop is fixed at one per run regardless of damage dealt or clear speed, which is why three clears is the standard benchmark for a single evolution.
What is the fastest way to catch a Frostwyrm in Catch a Monster?
Use a Chilled Lureball on inner-basin spawns rather than the outer ridge. Ice-type monsters resist standard Lureballs for the opening throws, so a chilled ball typically lands the capture in one or two attempts instead of six or seven.
Do failed evolution attempts consume my materials?
No. Shards and cores are only deducted when the evolution animation finishes. A failed or interrupted attempt leaves your inventory intact, so you lose time on the walk back, not currency.
Is Avalanchewyrm worth the full chain if I don’t own Frostwyrm yet?
It depends on your time budget. The full chain runs two to four hours for most players, while waiting for a future event cycle with an inherited Frostwyrm cuts that to well under an hour. If you have the time now and care about the evolved stat profile, run the chain; if not, bank shards this cycle and evolve efficiently next time.
