404 x Ash Fusion — Best Build in Grow a Chicken Fighter

Why it matters

The 404 x Ash build pairs the Secret-rarity 404 Chick (S-tier carry) with the Cycle of Ash skill carried by the Celestial Radiant Fenghuang. Community guides name it the best all-round build in the game — the one to build around if you can assemble both parts.

What is Cycle of Ash?

Cycle of Ash is a special ability reported on the Radiant Fenghuang — a Celestial fighter hatched from the Royal Egg (community-reported ~1% hatch rate). When fused onto a strong base, it is treated by the community as one of the highest-value skills in the game, on par with the top picks on the skill tier list.

The two parts

Base — 404 Chick (Secret): the rarest S-tier carry in the roster. Sources are the Cursed Egg (community-reported <1%) and the event-only Blazing Egg (community-reported 8%). See the 404 Chicken guide.
Donor — Radiant Fenghuang (Celestial): hatches from the Royal Egg (community-reported ~1% Celestial rate). It is the source of the Cycle of Ash skill. See the Royal Egg guide.

Both hatch rates are community-reported, not developer-published — treat them as targeting aids. The build is rare by definition, which is exactly why it tops the meta when it lands.

How to do the fusion

Follow the normal fusion mechanics — base + donor, lock the visible trait:

Set the 404 Chick as the base. Its role and rarity carry into the output.
Set the Radiant Fenghuang as the donor. It supplies the Cycle of Ash skill.
Lock Cycle of Ash. Locking the special ability is what separates this build from a plain 404 with a filler trait.
Read the cost before confirming. Fusion cost scales, and high-rarity donors are expensive — make sure you can afford the display cost before you commit the donor.

Don't fuse your only fighter

Fusion consumes the donor and re-rolls the base. Never fuse your only 404 Chick or your only Radiant Fenghuang — wait until you have a spare, or the run keeps its current best unit.

Where to get each part

404 Chick

The farming chain reported by the community: hatch a Scratch Egg to find the NPC Chick, let it lay Cursed Eggs, then open those Cursed Eggs chasing the Secret draw. See the Cursed Egg guide for the full chain. The event-only Blazing Egg offers a much better rate (8%, community-reported) but only appears during the Hot Event in the central ring.

Radiant Fenghuang

Royal Eggs (community-reported ~1% Celestial) are the documented source. The Royal Egg pool also carries Phoenix Hen, Nine-Tail Hen, Twin Rooster and other top-tier fighters, so farming Royal Eggs is productive even before the Fenghuang lands. Some community sources also point at Goose Egg openings and Hot Egg events as an alternate Cycle of Ash lead — treat that as the lower-confidence route. See our full Fenghuang guide for the hatch strategy and build advice.

Watch the full farm route

This walkthrough shows both endgame builds from a fresh start — the complete egg chain from a Classic Rooster up to the secret 404 Chick, and the Reaper Rooster + Voodoo alternative. Key details from the video that are easy to miss:

Hatch a Cosmo Brat first. Your Classic Rooster only lays nest eggs; the Cosmo Brat replaces it and produces Scratch Eggs on every cycle — build a stack before hatching.
Upgrade to a Stone Face. The NPC Chick only sometimes lays Cursed Eggs. Hatch a Stone Face from your first Cursed Eggs and let it farm instead — it produces Cursed Eggs consistently, so keep a doubled Stone Face in the coop while you stack a large batch.
Double your Zombie Chick. If you chase the Reaper route instead, fusing duplicate Zombie Chicks speeds up Haunt Egg production — more Haunt Eggs means more shots at Dohaan (the Voodoo donor) and Reaper Rooster.
Lock the ability, always. With Dohaan selected as the donor, lock Voodoo; with Radiant Fenghuang as the donor, lock Cycle of Ash. Check the fusion preview before confirming — one wrong click consumes both chickens.

After the fusion

Slot the fused bird as your permanent PIT fighter and run the money loop in the background. Then push the TOWER on 2x boost windows and rebirth to compound the permanent bonus. This build is the ceiling — everything else in your coop exists to support it.

Radiant Fenghuang FAQ

What is Radiant Fenghuang? A Celestial-rarity fighter hatched from the Royal Egg (community-reported ~1% rate). Community guides treat it as the best all-round meta unit because it carries the Cycle of Ash skill — the highest-value special in the game.

How do I get the Radiant Fenghuang? Open Royal Eggs — the documented source at a community-reported ~1% Celestial hatch rate. The pool also carries Phoenix Hen, Nine-Tail Hen and Twin Rooster, so farming Royal Eggs stays productive even before the Fenghuang lands.

Is Radiant Fenghuang the best chicken? As a fighter it is top-meta, but its real value is as a fusion donor — fusing it onto a 404 Chick to lock Cycle of Ash creates the community-reported 404 x Ash build. It is also listed on the chicken roster index with the rest of the observed fighters.

Common questions

Is the 404 x Ash build real? It is community-reported from the official Discord and community guides — no developer statement confirms it. Treat it as the current community meta.

Do I need both parts to win? No. S-tier and A-tier staples like Thunder Rooster and Astro Chicken carry most rosters fine. The 404 x Ash build is the ceiling, not the floor.