Mutations are the difference between a pet that earns decent cash and one that prints money. In Steal an Egg on Roblox, there are five distinct mutations you can land on your pets, each applying a flat multiplier on top of whatever the base income already is. Two of them come from egg spawns, and two require you to reach the Sakura Incubator in the end-game zone. Knowing which mutation to chase and how to get it changes your entire farming strategy.
What are mutations in Steal an Egg?
Mutations are special variants that attach to a pet and multiply its cash-per-second output. They stack on top of rarity, meaning a mutated common can sometimes out-earn an unmutated rare depending on the numbers. The mutation shows up visually on the egg shell before you even grab it, so you can spot one in a nest from across the biome if you know what to look for. Size is a separate attribute entirely, displayed as a weight in kilograms, and a Huge or massive roll on top of a good mutation is where the real income spikes happen.
Fusing mutated pets safely
All Steal an Egg mutations and multipliers
There are five mutations currently in the game. Here is the full breakdown:
Spirit Bloom is the strongest mutation at 3x, but it also has only a 2.5% chance from the Sakura Incubator, making it the rarest mutation in the game despite not being the hardest to access mechanically. Rainbow sits at 2.5x and can appear naturally from egg spawns, which gives it more farming opportunities even if the odds are not published.
How to get mutations from egg spawns
Silver, Golden, and Rainbow mutations all have a chance to appear directly on eggs that spawn across the biomes. The mutated shell color changes visibly before you pick it up, so patrol the nests regularly and prioritize eggs that look different. The bigger the egg you steal, the higher the potential income from a mutation on that pet, so always target the largest egg in a biome rather than the first one you see.
Admin Abuse events also hand out mutated eggs, and these are worth attending whenever one runs on your server. They are not a reliable daily method, but they can hand you a Golden or Rainbow pet without any of the usual hatch RNG.
How to get Bloom and Spirit Bloom from the Sakura Incubator
Bloom and Spirit Bloom are exclusive to the Sakura Incubator, which sits in the end-game zone of the map. Getting there requires enough speed to clear the boss guarding that area, so check your treadmill upgrades before making the trip. The Incubator applies the mutation to your egg before you hatch it, meaning you want to feed it your best egg rather than a throwaway.
Spirit Bloom at 3x is the top-tier outcome, but at 2.5% it will take multiple attempts for most players. Bloom at 1.5x is the more common result and still beats a base Golden mutation in raw multiplier terms.
What is the best mutation in Steal an Egg?
Spirit Bloom at 3x is the best mutation available. It beats Rainbow by 0.5x and doubles Silver outright. The catch is the 2.5% drop rate from the Incubator, which means farming it takes patience. For players who cannot reach the end-game zone yet, Rainbow at 2.5x from natural egg spawns is the next best thing and requires no special location.
For pure efficiency, the priority order looks like this:
- Spirit Bloom (3x) for maximum income on your best pet
- Rainbow (2.5x) for the best spawn-obtainable mutation
- Golden (2x) as a reliable mid-game boost
- Bloom (1.5x) if you have Incubator access but Spirit Bloom hasn't dropped
- Silver (1.25x) as a minor early-game bump worth keeping until something better lands
Tips for maximizing mutations
- Steal the largest egg in every biome. Bigger eggs produce bigger pets, and a mutation on a high-base-income pet multiplies into significantly more cash than the same mutation on a small one.
- Hold onto mutated pets even if the base rarity is low. A Golden Common can still contribute meaningful income early in a run.
- When fusing, try to fuse three pets that all carry the same mutation. This preserves the variant through the fusion and keeps your multiplier intact.
- Check the pet card money-per-second value before trading or giving away any pet. A Huge Silver can outperform a normal Rainbow depending on the weight roll.
For more egg-farming strategy across Roblox games, the Steal an Egg eggs, pets, and income rates guide breaks down every egg by biome and rarity so you know exactly which nests to prioritize.
If you enjoy this style of collection-farming gameplay, the Cut Grass for Brainrots mutations guide covers a similar mutation system with Gold, Diamond, Rainbow, and Electro variants worth understanding for comparison.
For a full collection of Roblox strategy guides covering everything from egg farming to progression systems, the Roblox guides hub has everything organized by game.