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•Hamza Rashid• 10 min read
Steal An Egg
Steal an Egg: Mutations and Sizes Explained
Steal an Egg sends players across nine biomes to grab eggs from nests, carry them home, and hatch them into pets that generate cash over time. Every hatch produces a pet with layered traits stacked on top of each other, and two of those traits, mutation and size, decide whether a pet earns pocket change or genuine end-game income.
A rainbow-colored shell or an unusually heavy egg can turn a common pull into a top earner long before rarity even factors in. Mutations attach a flat multiplier to whatever a pet already earns, while size measures a pet's actual weight in kilograms and scales income on its own.
Both traits show up before a pet finishes hatching, so spotting them early changes which eggs are worth the risk and which ones are better left in the nest. The multiplier behind each mutation, the steps to reach the Sakura Incubator, and the way size stacks with rarity all shape a pet's final payout.
Steal an Egg Mutations and Sizes Summary
Steal an Egg currently runs five mutations: Silver, Golden, Rainbow, Bloom, and Spirit Bloom, and each applies its own multiplier on top of a pet's base income
Silver, Golden, and Rainbow spawn naturally on eggs found across biome nests, showing up as a shell color change before the egg gets picked up
Bloom and Spirit Bloom come only from the Sakura Incubator in the Cherry Blossom zone, which needs the Crane pet to activate
Spirit Bloom carries the strongest reported multiplier of the five, though it lands at only a small chance even at full incubator charge
Size measures a pet's weight in kilograms and applies its own multiplier, separate from both rarity and mutation
Larger eggs tend to hatch into heavier, higher-paying pets, which makes the biggest egg in a nest worth prioritizing over a smaller one nearby
Rarity, size, and mutation all stack together, so a mutated common with a large size roll can out-earn an unmutated pet several rarity tiers above it
Fusing three pets at the Fuse Machine risks losing a mutation unless every pet going in already carries the same one
What Mutations Do in Steal an Egg
A mutation is a visual variant that attaches to an egg or pet and multiplies its cash-per-second output on top of whatever the base rarity already pays. The effect stacks separately from rarity, which means a mutated common pet can genuinely out-earn a plain rare or epic pull depending on the exact numbers involved. Mutations show up as a shell color change on the egg itself, so a sharp-eyed player can spot one sitting in a nest from across the biome before ever picking it up.
Five mutations currently exist in the game, split across two separate paths. Silver, Golden, and Rainbow appear naturally on eggs found while stealing across the map, while Bloom and Spirit Bloom only come from a dedicated machine in the final biome. Knowing the split matters because chasing a natural spawn mutation takes patience and biome access, while chasing an incubator mutation takes a completely different set of prerequisites tied to the end-game zone.
Steal an Egg All Five Mutations and Their Multipliers
Each mutation carries a fixed multiplier that community trackers have logged by comparing matched pets with and without the variant applied. The developer has not published an official patch note confirming every number, so treat the figures below as the current, widely observed baseline rather than a locked-in formula.
Mutation | Reported Multiplier | Source |
|---|---|---|
Silver | 1.25x | Natural egg spawn |
Golden | 2x | Natural egg spawn |
Rainbow | 2.5x | Natural egg spawn |
Bloom | 1.5x | Sakura Incubator |
Spirit Bloom | 3x | Sakura Incubator |
Spirit Bloom sits at the top of the list by a clear margin, beating Rainbow by half a multiplier point and doubling what Silver provides on its own. That strength comes with a real cost since Spirit Bloom only lands a small percentage of the time even when the Sakura Incubator gets charged to its maximum.
Rainbow stands out as the strongest mutation available without setting foot in the end-game zone, which makes it the practical target for players still working through earlier biomes. Golden and Bloom both sit in a comfortable middle tier, useful enough to keep a pet in rotation without being worth heavy farming once a stronger variant becomes reachable.
How to Find Silver, Golden, and Rainbow Mutations
Natural spawn mutations appear directly on eggs sitting in biome nests, and the shell visibly differs in color from a standard egg before it even gets grabbed. Patrolling the same nests repeatedly across a play session raises the odds of spotting one, since spawns refresh over time and mutated eggs are not locked to any single biome or rarity tier.
Check every nest before committing to a steal: a mutated shell color stands out clearly against a normal egg in the same nest
Prioritize the largest egg available: a bigger base egg produces a bigger pet, so a mutation on that pet multiplies a larger starting number
Attend Admin Abuse events whenever one runs: these events can hand out mutated eggs directly, skipping the usual spawn odds entirely
Avoid fusing mutated pets with plain copies: the Fuse Machine has a high chance of dropping the mutation unless all three pets going in share the same variant
Silver, Golden, and Rainbow all draw from the same spawn pool, so there is no dedicated farming route for any single one of the three beyond simply stealing more eggs across more biomes. Players working toward Rainbow specifically should expect a longer grind, since it appears to spawn less often than Silver or Golden based on community reports.
Holding onto a mutated pet even at a low rarity tier still pays off early, since the multiplier applies regardless of how common the base pet happens to be. A Golden common, for example, can out-earn a plain uncommon or rare for a meaningful stretch of a run before better pets replace it.
Unlocking the Sakura Incubator for Bloom and Spirit Bloom
The Sakura Incubator sits inside the Cherry Blossom zone, the final biome on the current map, and it applies the Bloom and Spirit Bloom mutations to any egg placed inside it. Reaching this machine requires enough Speed to clear the zone's guardian, so treadmill and trail upgrades matter well before an egg ever reaches the incubator itself.
Reach the Cherry Blossom zone: this requires a heavy Speed investment, since it sits at the far end of the map behind a guardian
Hatch or steal a Crane pet: Crane is an Epic pet that hatches specifically from eggs found in the Cherry Blossom zone
Submit the Crane to the Incubator: interacting with the machine and handing over the Crane permanently activates it, and the Crane itself is consumed in the process
Farm Sakura Crystals during the Great Bloom event: this event runs roughly every 30 minutes and lasts a few minutes, giving players a window to hit blooming Sakura trees with a baseball bat for crystals
Charge the Incubator and add an egg: charging to 100 percent guarantees a mutation lands, and pushing the charge toward the maximum noticeably raises the odds of landing Spirit Bloom instead of the standard Bloom result
Feeding a throwaway egg into the Incubator wastes the opportunity, since the machine applies its mutation to whatever egg sits inside regardless of that egg's underlying rarity or size. Saving the largest, rarest egg available for an Incubator run gets far more value out of the same crystal investment than mutating a small common egg early.
What Size Means for a Steal an Egg Pet
Size is a separate stat from both rarity and mutation, displayed as a raw weight in kilograms on a pet's card once it hatches. A pet's weight rolls independently at the point of hatching, and a standout roll on an otherwise ordinary pet can push its income well past what the base rarity alone would suggest.
Bigger eggs generally produce heavier, higher paying pets once hatched, which is why stealing the largest egg visible in a nest consistently outperforms grabbing the first one seen. Community trackers report that pets rolling into the range of roughly one million kilograms can generate income in the millions per second, showing how far a strong size roll alone can carry a single pet's earnings. No official size-tier chart has been published by the developer, so the safest approach is comparing a pet's listed kilogram weight directly against similar pets already sitting in a base.
How Size and Mutation Stack With Rarity
A pet's total income comes from three layers applied on top of each other rather than from any single stat working alone. Rarity sets the base income rate for a species, size then multiplies that base rate according to the pet's rolled weight, and mutation applies its own separate multiplier on top of both. This stacking explains why two pets sharing the same species and rarity label can show wildly different income numbers in practice.
A small, unmutated epic pet and a heavy, Rainbow-mutated epic pet carry the same name and rarity tag, yet the second one can realistically out-earn several higher-rarity pets that lack both a strong size roll and a mutation. Checking the actual money-per-second value on a pet's card before trading it away, skipping it, or feeding it into the Fuse Machine avoids losing a pet that looks unremarkable on paper but pays out far more than expected.
Steal an Egg Tips for Farming Better Mutations and Sizes
Consistent income growth in Steal an Egg comes down to combining size priority, mutation awareness, and enough Speed to reach better biomes safely. A few habits make that combination easier to hit run after run.
Steal the largest egg in every biome visited: size and mutation both apply to whatever base pet gets hatched, so a bigger starting egg raises the ceiling on both
Save strong eggs for the Sakura Incubator: feeding a throwaway egg into the machine wastes crystal farming that could have gone toward a rarer, heavier egg
Check the money-per-second card before any trade or Fuse attempt: a heavy, mutated lower-rarity pet can quietly outperform an unmutated higher-rarity one
Fuse only pets that share the same mutation: mixing mutated and unmutated pets in the Fuse Machine risks losing the variant entirely
Push Sakura Incubator charge toward the maximum: a higher charge raises the odds of Spirit Bloom landing instead of the more common Bloom result
Balancing these habits against Speed training keeps a base earning steadily instead of stalling out on early biomes. Players who only chase rarity without checking size or mutation tend to plateau earlier, since a maxed-out rarity ladder still leaves real income on the table if size and mutation get ignored.
Treating every hatch as a three-part result, rarity, size, and mutation together, rather than judging a pet on rarity alone leads to far better base management over time. Small adjustments like patrolling nests for shell color changes or timing runs around the Great Bloom event add up across an entire play session.
FAQs About Steal an Egg Mutations and Sizes
Final Words
Chasing rarity alone leaves real income sitting on the table in Steal an Egg, since size and mutation both apply multipliers strong enough to outweigh a rarity tier or two on their own. Patrolling nests for shell color changes, saving strong eggs for the Sakura Incubator, and checking a pet's actual money-per-second value before trading it away turn a random hatch into a predictable income source over time.
Building toward Spirit Bloom takes patience, but stacking a heavy size roll with even a mid-tier mutation like Golden already puts a pet well ahead of an unmutated equivalent.
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“ Hamza is your average video game enthusiast who’s always looking for his next game to play. Whether he’s diving into a competitive multiplayer match, exploring a massive open world, or getting completely hooked on a new release, gaming has always been one of his favorite ways to spend his time. Over the years, his love for games has grown into a passion for understanding and sharing everything about them. Through his articles, Hamza aims to help gamers discover new games, improve their skills, stay up to date with the latest gaming news, and get the most out of their favorite titles.”
