Steal An Egg Fuse Machine: Rules, Costs and Upgrade Risks
Use the ordinary Fuse Machine with a clear loss budget and understand why three large inputs do not guarantee a larger pet.
The community Wiki and Eldorado describe ordinary fusion as combining three pets of the same species. A heavier result is possible, but a lighter result is possible too. Use spare copies, compare the final machine quote with the income you would lose, and keep your strongest earners out of a fusion you cannot afford to lose.
Check the ordinary machine, not another crafting system
The Wiki’s inspected eligibility model requires three matching species. It also describes exclusions for favorites, pets assigned to another fusion, and species marked as unable to fuse. These are client-model findings; the message shown by your machine is the final check for your selection. The two-pet Secret Shrine and the egg-based Lab use different rules.
- Set aside three duplicate pets you can lose without damaging your main income.
- Record each pet’s species, pet weight and mutations. Do not substitute the weight printed on an unhatched egg.
- Select the pets at the ordinary machine and resolve any eligibility message.
- Read the final price and inspect all three selected inputs again.
- Confirm only if both the cash cost and the loss of those pets fit your budget.
A calculator is a risk estimate
The Wiki calculator models size from the inputs’ internal Scale values and warns that results can be smaller than every input. Its species-preservation assumption and mutation inheritance are not complete server verification. Eldorado separately describes a fusion result lighter than all inputs. A median weight is a midpoint of a model, not a promised hatch.
Price and income are different calculations
Swipe or scroll sideways to see all columns.
| Inputs | Modeled fee factor | Decision |
|---|---|---|
| No mutations | ×1 | Compare the quote with losing all three pets |
| Mutations present; at most one per input | ×2 | A higher fee does not establish better size odds |
| At least one input has multiple mutations | ×3 | Check the full price before using valuable combinations |
The Wiki estimates the fee from three minutes of combined modeled income, with species, weight and mutations feeding that estimate before the separate fee factor. Its model excludes player and server money boosts. Compare the live quote instead of substituting a boosted leaderboard rate.
For your own budget, add the three inputs’ current earning rates before removal. If they earn 100, 200 and 300 money per second, you would remove 600 per second. A hypothetical result earning 500 per second would leave you 100 per second worse off, even if it looks larger. This is an arithmetic illustration, not a recorded game result.
When to postpone fusion
Postpone when one input funds your next upgrade, when the quote consumes your reserve, or when you are relying on an unconfirmed inheritance rule. Keeping a valuable duplicate is a valid outcome. Fusion is optional progression risk; the available evidence does not establish a recipe that always increases weight or income.
Common questions
Do I need three pets of the same species for the Fuse Machine?
The ordinary machine is described as requiring three pets of the same species. Check eligibility in the current selection menu.
Why did fusion produce a smaller or weaker pet?
The output is rolled rather than the sum of the input weights. The reviewed model and example allow a smaller result, so fusion does not guarantee an upgrade.
Which pets or recipes are worth fusing?
Start with spare matching copies and preserve your main earners. No universally optimal input combination is established here.
How do pet weight and mutations affect the fusion cost?
The Wiki derives modeled income from species, weight and mutations, uses three minutes of combined income, then applies a mutation fee factor. Compare the live quote; the complete server formula is unverified.
Sources and checks
- Fuse Calculator: Chances, Cost & How to Fuse | Steal an Egg Wiki Checked Oct 3, 2026
- Steal an Egg Fuse Machine Guide: Results & Tips Checked Oct 3, 2026