Steal An Egg: How to Find and Use the Secret Fusion Shrine

The Secret Fusion Shrine is a hidden room inside the Angels and Demons biome in Steal An Egg, and it lets you merge a high-rarity Light pet with a high-rarity Dark pet into a Fusion Egg. There is no visible door and no marker on the map, so the only way in is to know the exact spot to walk through.

Quick answer: Enter the Angels/Demons biome (the last landmark), find the gate on the right, then walk straight into the waterfall directly opposite that gate to drop into the shrine.

Requirements before you go

The shrine sits inside the newest biome, so you first need to be able to reach and survive that zone. Two things gate access.

20 billion Speed to enter the Angels and Demons biome and steal safely.
An eligible Eternal or Divine Light pet and an eligible Eternal or Divine Dark pet to actually fuse.
The biome only appears at night, so wait for the day-night cycle to shift before heading over.

Only Light and Dark pets from this biome qualify. Ordinary Eternal or Divine pets from older biomes will not be accepted at the pedestals.

How to reach the Secret Fusion Shrine

Raise your walk speed and head straight to the Angels or Demons landmark, currently the final landmark in the game. Depending on your speed, the walk takes anywhere from about 10 seconds to a minute.

Once you arrive, look to your right for the large gate. It shows as the Angel’s Gate when you visit during the day and the Demon’s Gate at night.

Turn around so you are facing the spot directly opposite that gate. There you will see a waterfall, which appears blue in normal water color by day and red by night. If several streams are nearby, the correct one lines up with a landmark that faces a different direction than the others.

Walk into that exact waterfall and clip through it. In the Demons form the same spot becomes a lava stream, but the entrance stays in the same place, so keep pushing forward until the screen moves you into the fusion area.

Which pets the shrine accepts

Inside are two platforms, one for a Light pet and one for a Dark pet. The shrine takes only the Eternal and Divine pets from the Angels and Demons biome, which leaves four eligible options.

Pet	Type	Rarity
ArchAngel	Light	Divine
Pegasus	Light	Eternal
World Burner	Dark	Divine
Skeleton Horse	Dark	Eternal

Because the Angels form only drops Light pets and the Demons form only drops Dark pets, catching both sides usually means returning across several night cycles. The rare Merged biome shows both egg types at once and adds a luck bonus, making it the best window to hunt these rarer pets.

How to fuse and confirm it worked

The fusion needs one Light pet and one Dark pet on the pedestals at the same time. If you do not have both sides yourself, invite a friend who holds the alternate pet, or find a partner through the Steal An Egg Discord.

Stand on the correct platform and hold out your eligible pet. Place a Light-type pet on the Light platform and a Dark-type pet on the Dark platform.

Wait a few seconds. Both pets start rotating and combine into a Light + Dark fusion. Each player involved receives their own Fusion Egg.

Place the Fusion Egg in your pen and wait for it to hatch. The egg reveals the fused pet, which is among the rarest in the game.

You know the process succeeded when the pets stop rotating, the Fusion Egg lands in your inventory, and it hatches into the fused pet once placed in your pen. That result is the whole reason to chase duplicate Eternal and Divine pets from the biome rather than keeping just one of each.