Steal An Egg Fusion Guide

The result weighed 9% of the three inputs together and 35% of the lightest one. Using the wiki's size formula (income grows with weight to the power 0.62, from the 75 kg base size of a Scorpion), the three inputs earned $134K/s together and the result $20.1K/s: the heaviest input alone earned 2.8× as much. The fee was $114M. One Silver Scorpion was among the inputs; the result showed no Silver label. One test proves the machine can roll down; it does not tell us how often.

The Secret Shrine (Angels & Demons)

The wiki says the Demons "have been whispering about a secret shrine" in the zone, and that it fuses one Light pet with its Darkness counterpart of the same rarity. Two recipes are listed: Pegasus + Skeleton Horse (both Eternal) make Equinox, and ArchAngel + World Burner (both Divine) make Aetheron. The zone arrived with Angels vs Demons on Sep 12, 2026.

The wiki disagrees with itself on the results' income: the cards on its zone page say $2.6B/s for Equinox and $10B/s for Aetheron, while its pet data table says $1.8B/s and $6.9B/s. This site uses the data table everywhere, so the numbers here match the pet pages; if the cards are right, the fusions are closer to break-even than the table above shows. Source: Wiki: Angels & Demons.

How players do it, per a widely shared PSA on Reddit (player report): two players each bring one of the two pets, and each walks away with a result built from the pet they brought. The example in the post: a 136,995 kg Pegasus with Fractured + Silver gave its owner a 136,995 kg Equinox with Fractured + Silver, and the partner's 1,698,857 kg Horse gave the partner a 1,698,857 kg Equinox. So you do not need a partner with a big pet; you need your own best one, because the same post says each account gets one Eternal and one Divine fusion.

The Manor fusion (Cursed Monarch)

Halloween Part 2 (Oct 24, 2026) added the Abandoned Manor, and with it a fusion that players report: Ghost Fish + Voidseer Pumpkin → Cursed Monarch, a Divine at $12.5B/s base income. Voidseer Pumpkin is 0.056% of Manor eggs (1 in 1,786). Players on Reddit look for a second player to "complete" the fuse even when they own both pets, which points to a two-player step. Players argued at first that a big Ghost Fish matters more than a big Voidseer. Then one player fused a 2 million kg Ghost Fish with a "decent sized" Voidseer Pumpkin and got a 48k kg egg (Reddit); replies say that for this fusion the Voidseer side, or the income rather than the kg, decides the result. Nobody has posted a set of measured results. Sources: Reddit r/StealAnEggRoblox, Reddit r/StealAnEggRoblox, YouTube (Vindooly).

The Enchanted Forest machine

Players report a hidden fusion machine in the Enchanted Forest that takes Royal Skywhale (0.02%) and Celestial Sunlion (0.31%), and say you need both pets and a partner. Collecting both takes about 5,323 Enchanted Forest eggs on average. Players call the result their "spirit guardian": Spirit World Guardian, a Divine the wiki lists at $15B/s base income with no nest chance (player report; the wiki does not describe the fusion). Players ask whether the machine unlocks only through the quest on the update's release day.

Here the pair you bring decides the result, and reports conflict on which pet should be the big one. One commenter's friend used a 1M kg Royal Skywhale earning about $430B/s and a 10k kg Celestial Sunlion, "literally one of the smallest possible", and "only got a 560 bil spirit guardian", even after stacking four mutations on it (Reddit). Some players say a big Sunlion with a small Skywhale works best; others say either way round works as long as one is big and one is small; the same thread warns that two big pets is not better. Nobody has posted enough measured fusions to settle it. The zone came with Enchanted Forest on Oct 3, 2026. Sources: Reddit r/StealAnEggRoblox, Reddit r/StealAnEggRoblox, Reddit r/StealAnEggRoblox, Reddit r/StealAnEggRoblox.

What players have worked out

These are player reports from Reddit, mostly passing on tests and pinned posts from the official Discord. The developers have not published fusion rules, so each row links its posts; where players disagree, the row says so.

What nobody knows yet

If you fuse, note the weight, mutation and income of every input and of the result before and after; that is exactly the evidence missing above. The income calculator turns a weight and mutation into income, and the tier list shows where each fusion result ranks.

Before you fuse: a checklist

A fusion uses up both pets and no source describes a way to undo it. Players who rushed one post about it afterwards (Reddit). Before you press the button:

• It is permanent. Both inputs are gone once the fusion runs; there is no undo button in any report we found.
• One Eternal and one Divine Shrine fusion per account, players report (PSA). Bring the heaviest, most mutated pet you have, not the first one you hatch.
• Mutate first. Players report your pet's mutations carry over, so add the ones you want before fusing, not after.
• Check the weight rule for that recipe. At the Shrine your own pet's weight counts; in the Enchanted Forest and the Manor the pair decides, and reports conflict on which pet should be big. Read the sections above first.
• Write down the numbers. Weight, mutations and income of both inputs, and of the result. That is the evidence still missing on this page.
• Don't rush. A reply under that bad Manor fusion: "never FOMO the fuse. You have until the end of the week."

Fusion FAQ

How does fusion work in Steal An Egg?

There are two kinds. The Fuse Machine takes three pets of the same species plus a cash fee and gives back one egg of that species, with a new random weight. Recipe fusions take two specific pets and give a different pet that does not spawn in any nest: the Secret Shrine in Angels & Demons has two recipes on the wiki, and players report two more, in the Halloween Manor and the Enchanted Forest. The full list is in the table above.

What does the Fuse Machine do?

In the one public test we found, it took three Scorpions (457 kg, 256 kg, 247 kg) and $114M, and the egg it gave back hatched into a Scorpion of 86 kg, lighter than every input. So it is a reroll, not an upgrade. Source.

Where is the Secret Shrine?

In the Angels & Demons zone, hidden in the waterfall, according to the wiki's Biomes page. It is there in all three forms of the zone (Angels, Demons and the merged form). The wiki says it fuses one Light pet with its Darkness counterpart of the same rarity.

What do Pegasus and Skeleton Horse make?

Equinox, an Eternal, at the Secret Shrine. Its base income in the wiki's data table is $1.8B/s, against $2.6B/s for the two inputs together, so at base size you trade 31% of the income for one pet slot.

How do you get Aetheron?

Fuse ArchAngel and World Burner, the two Divines of Angels & Demons, at the Secret Shrine. Each is 0.02% of the eggs on its side (1 in 5,000), so collecting both takes about 10,000 eggs on average. Aetheron earns $6.9B/s at base size.

How do you get the Cursed Monarch?

Players fuse Ghost Fish and Voidseer Pumpkin in the Abandoned Manor of the Halloween Dimension, added with Halloween Part 2. Voidseer Pumpkin is 0.056% of Manor eggs; Ghost Fish has no drop chance, and players report catching it by fishing. This is a player report; the wiki has no page for the fusion yet.

Do you need two players to fuse?

For the recipe fusions, players report yes. At the Secret Shrine two players each bring one of the two pets and each gets the result; the Equinox PSA describes a partner's Horse making the partner his own Equinox. For the Manor's Cursed Monarch and the Enchanted Forest machine, Reddit posts ask for a partner even when they own both pets. The Fuse Machine in your base works alone.

Does fusion keep mutations or size?

For the recipe fusions, players report that your own pet's mutations carry over, and at the Secret Shrine that your own pet's weight does too, while your partner's pet changes nothing for you. A few players report a result much lighter than their input, so the weight part is less certain. In the one Fuse Machine test a Silver input went in and no Silver label showed on the result, which was lighter than every input. Sources are in the "What players have worked out" table above. None of it is on the wiki or from the developers.

Can you undo a fusion?

No source describes a way back. Both inputs are used up, and players who got a worse result than they hoped say so plainly: "it already happened we can't do what's already done" (Reddit). Players also report the Eternal and Divine Shrine fusions can be done only once per account, so use the checklist above before you fuse.

What does the Enchanted Forest fusion make?

Spirit World Guardian, according to players: Reddit comments about fusing Royal Skywhale and Celestial Sunlion call the result their "spirit guardian" (Reddit). The wiki lists Spirit World Guardian at $15B/s base income with no nest chance, but does not describe the fusion. Treat it as a player report.

Is fusing worth it?

By base income alone, it depends on the recipe: Equinox earns 69% of its two inputs together, Aetheron earns 69% of its two inputs together, Cursed Monarch earns 81% of its two inputs together and Spirit World Guardian earns 150% of its two inputs together. Equinox, Aetheron and Cursed Monarch are a trade of income for a free pen slot and a pet you cannot hatch; Spirit World Guardian earns more than its inputs. Real results depend on the weight and mutations you bring, which is where players report big swings. The Fuse Machine is a gamble on weight; only use copies you can afford to lose.

Wiki facts: Steal An Egg Wiki (CC BY-SA). Player reports are linked where they appear. Facts checked Oct 31, 2026.