Two chicken fusions sit at the top of Grow a Chicken Fighter. One is built for combat and one is built for speed. The Reaper Rooster fused with a Doll Hen carries strong base stats, heavy damage, and a shield-and-reflect ability, which makes it the strongest fighter for the PIT and the TOWER. The 404 Chick fused with a Radiant Fenghuang is the setup you want for fast rebirthing, since it lets you loop cycles far quicker.
Quick answer: Breed the egg chains below to hatch a Reaper Rooster (<1%) and Doll Hen (2%) from Haunt Eggs, then lock Voodoo on the Doll Hen and fuse it with the Reaper Rooster. For rebirthing, hatch a 404 Chick (<1%) and a Radiant Fenghuang (1%), lock Cycle of Ash on the Fenghuang, and fuse the two.
What each fusion does
Both builds serve different goals, so it helps to know which one to chase first. If you spend most of your time fighting, the Reaper build wins. If you are grinding toward higher rebirth tiers, the 404 build pays off faster.
| Fusion | Best for | Key trait |
|---|---|---|
| Reaper Rooster + Doll Hen | Combat (PIT and TOWER) | High stats, strong damage, shield and reflect via Voodoo |
| 404 Chick + Radiant Fenghuang | Fast rebirthing | Rapid cycle speed via Cycle of Ash |
Reaper + Voodoo combat build breeding path
This build runs through seven breeding stages before the final fusion. Each chicken lays a specific egg type that unlocks the next one, so follow the chain in order.
404 + Ash rebirth build breeding path
This build needs two separate chains that both branch off Scratch Eggs. Run each chain to its end, then combine the two results.
404 Chick chain
Radiant Fenghuang chain
Final fusion
Lock the Cycle of Ash ability on the Radiant Fenghuang, then fuse the 404 Chick in Slot A with the Radiant Fenghuang in Slot B. The result is the fastest rebirthing chicken in the game.
Lock the ability before you fuse
Fusion only carries over a special ability if you lock it first. Open the fusion menu, select the chicken that holds the ability you want to keep, and lock it before confirming the fuse. For the combat build that means locking Voodoo on the Doll Hen. For the rebirth build it means locking Cycle of Ash on the Radiant Fenghuang.
If you skip the lock step, the ability is lost and the fusion is not worth repeating from scratch. Confirm the ability shows as locked in the menu before you press fuse.
Hatch rates for the key chickens
Each rare chicken sits behind a low hatch rate, so plan to farm the matching egg in bulk. The odds below are the numbers that gate each build.
| Chicken | Egg source | Hatch chance |
|---|---|---|
| Doll Hen | Haunt Egg | 2% |
| Reaper Rooster | Haunt Egg | <1% |
| Radiant Fenghuang | Royal Egg chain | 1% |
| 404 Chick | Cursed Egg chain | <1% |
How to confirm the fusion worked
A successful fuse replaces the two parent chickens with a single mutated chicken that shows the locked ability on its card. Check that Voodoo appears on the Reaper build and that Cycle of Ash appears on the 404 build. If the ability is missing, it was not locked before fusing, and you will need another copy of the ability chicken to try again.
With both fusions in hand, send the Reaper + Voodoo chicken into the PIT and TOWER for damage, and put the 404 + Ash chicken to work when you are pushing rebirths. The slow part is the farming, not the fusing, so keep the self-sustaining egg loops (Zombie Chick for Haunt Eggs, 404 Chick for Cursed Eggs) running while you wait on the low-percentage pulls.
