TL;DR
- Mutations in Steal an Egg are color auras or particle effects that multiply a pet's income, and they stack with size multipliers to significantly increase earnings.
- The game features several paths to obtaining mutations, including natural rolls from wild eggs, the Fuse Machine, and event-specific routes like the Hungry Frog and Dr. Scramble.
- The most valuable mutation is Luminous, offering a multiplier of approximately 10x, while Rainbow provides around 3.5x, making them top choices for maximizing earnings.
Disclaimer: This summary was created using Artificial Intelligence (AI)
Steal an Egg mutations decide whether you own a dusty Forest chicken or a glowing Rainbow shark that pays for your next Speed upgrade while you make a sandwich. Same species, wildly different money per second.
The devs never published an official multiplier sheet. Everything below comes from community-measured data, like Fandom wiki tables and the mid-September 2026 update wave, including the Sept 19–20 Discord patch notes for Dr. Scramble.
Numbers bounce a little because size also multiplies income. Always trust the money/s on your pet card over any spreadsheet, this guide included.
If you’ve ever lost a server right before a big hatch, you already know why the details matter. Let’s get into them.
What is Mutation in Steal an Egg?
A mutation is a color aura or particle effect attached to an egg. Hatch the egg and the pet keeps it. The aura multiplies the pet’s base income. Size is a separate roll, shown in kg on the pet card, and the two stack:
Final cash ≈ base income × mutation multiplier × size multiplier
You can’t paint a mutation onto a living pet. You either hatch it already mutated, or you apply a consumable or incubator to an unhatched egg sitting in your pen. Fandom calls these color mutations, or auras.
Every hatched pet has a chance to roll one, and the rarer ones stack with a good size roll to push income far past base.
How Mutation and Size Stack
Here’s the community math on a $100/s dummy pet:
| Pet | Math | Income |
|---|---|---|
| Normal | Base | $100/s |
| Huge, no mutation | 100 × 5 | $500/s |
| Rainbow, normal size | 100 × 3.5 | $350/s |
| Golden + Giant | 100 × 2.5 × 3 | $750/s |
| Rainbow + Huge | 100 × 3.5 × 5 | $1,750/s |
Look at rows two and three. A plain Huge pet beats a normal-sized Rainbow of the same species. That’s why veterans say “steal the fat egg first.”
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Full Steal an Egg Mutation Roster (Sept 20, 2026)
Ranked by hype, with both the wiki value and the wider community range:
| Mutation | Multiplier | How You Get It | Still Obtainable? |
|---|---|---|---|
| Luminous | ~10x, plus a rarity jump | Luminous Eggs in the Robux shop; Luminous Re-roll | Yes, limited shop |
Rainbow | x3.5, 2.5x–3.5x (community) | Wild eggs, ~1/100 roll weight, Fuse Machine, Admin Abuse | Yes |
Parasite / Monstrous | ~3x | Parasite Egg from the Monster Chest (~1.5%) | Event-locked |
Spirit Bloom | 2.5x–3x | Sakura Incubator, ~2.5% of rolls | Event-locked |
Fractured | ~2.75x | Mutation Consumable, 400 Boss Tokens, 10% apply chance | Yes, while Rift / Boss Shop lives |
Scrambled | ~2.75x | Dr. Scramble Experiment Shop, 475 Samples, 10% apply chance | Yes, during the event |
Golden | 2x–2.5x | Wild eggs, 4/100 roll weight, Fuse Machine, Admin Abuse | Yes |
Bloom | 1.25x–1.5x | Sakura Incubator, ~97.5% of rolls | Event-locked |
Silver | 1.2x–1.25x | Wild eggs, 6/100 roll weight, Fuse Machine, Admin Abuse | Yes |
IGN’s testers refused to publish one Silver number. Their Silver T-Rex showed +20% and their Silver King Snake showed +17%. Weight bends the display, so the ranges above are guides, not gospel.
Rainbow is king of everyday play. Luminous is the “I spent Robux and the universe smiled” jackpot. Parasite and Spirit Bloom sit just under Rainbow whenever their events run.
How to Spot a Mutated Egg Before You Steal It
Mutated eggs usually look different before you grab them:
- Silver: metallic sheen with reflections
- Golden: gold texture with coin particles
- Rainbow: an animated swirl that keeps changing colors
- Parasite: a visible parasite on infected eggs during the Hungry event
Nests refresh after a night reset, roughly every 4.5 minutes. Patrol them, check the color-changed shells first, then check the biggest egg in every biome before you commit.
A chunky plain egg often beats a tiny mutated egg two biomes away, and bigger eggs tend to hatch bigger pets.
Path 1—Natural Rolls: Silver, Golden, Rainbow
These three are the daily grind. You find them on wild eggs, roll them at hatch, or get them through the Fuse Machine.
Hatch Odds in Plain Words
Fandom’s roll weights are Silver 6 out of 100, Golden 4 out of 100, and Rainbow 1 out of 100. The wiki calls Rainbow an extremely rare hatch roll, and it pays like one at x3.5.
Admin Abuse Is the Cheat Code
Devs (Brockodile, Ben, and others) sometimes spawn already-mutated, high-tier eggs: Golden Divine Kitsune, Silver Eternal Oni Tiger, Monstrous Secret King Snake.
Sessions have landed around Saturdays before big updates. A server message pops: “A [egg] spawned in [zone]!” Sprint, hold E, and don’t get clapped by the guardian on the way home.
A Golden Kitsune has been measured around $4.4B/s. That’s the gap between grinding Speed and buying the next treadmill because you felt like it. The cap is tiny, often 7 eggs, so join a server about 15 minutes early.
Admin Abuse also boosts mutation rates server-wide and adds the Admin Treadmill, so mid-game players can reach Cherry Blossom or Titan Temple before an event ends.
Path 2—Fuse Machine
The Fuse Machine sits on the left side of the starter area. Feed it three of the same species. It eats all three and returns one egg of that species.
The UI hint says “Better pets give more Luck!”, so higher-earning inputs roll mutations more often.
The Three-Copy Rule
- Fuse three plain copies for a shot at Silver, Golden, or Rainbow.
- Fuse three copies that share the same mutation for a chance to keep it and grow size.
- Never fuse one Rainbow with two normals. Inheritance isn’t guaranteed, and several guides treat the mutated pet as lost the moment it goes in.
Three earners become one earner. Don’t fuse your three best money printers unless the output can beat all three combined. It usually can’t.
See Also: Dungeon Lootr Codes (September 2026): Free Gems & Loot
Path 3—Sakura Incubator (Bloom / Spirit Bloom)
The incubator sits at the back of the Cherry Blossom biome. You unlock it by sacrificing an Epic Crane, then charge it with Sakura Crystals from the Great Bloom / Cherry Blossom event. Charge level decides the roll.
Status: not currently active. Bloom and Spirit Bloom can still show up on random eggs during Admin Abuse.
The wiki’s steps:
- Reach the required speed to enter Cherry Blossom.
- Collect Sakura Crystals from the biome.
- Place your target inside before charging further.
- Charge to the max threshold.
Charge, Decay, and Stacking
Most sources land on about 97.5% Bloom and 2.5% Spirit Bloom, roughly one every 40 rolls. The wiki says max charge doubles the Spirit Bloom chance from 5% to 10%.
Those numbers disagree, so treat the exact odds as unsettled. Charge also decays when the machine sits idle, so drip crystals in and don’t hoard them overnight.
The best trick is stacking. Drop in an egg that already has Silver, Golden, or Rainbow, and the hatch can keep the old mutation and add Bloom or Spirit Bloom.
That’s how the stacked cards people flex in Discord get made. Bloom is x1.25 and Spirit Bloom is x2.5, so the incubator is at its best when you feed it your strongest egg.
Path 4—Hungry Frog / Hungry Monster (Parasite / Monstrous)
This is an event-only route to a ~3x aura. Infected eggs carry a visible parasite. Feed five of them to the frog or monster and you get a Monster Chest.
The chest has a ~1.5% shot at a Parasite / Monstrous Egg, and that egg hatches with a guaranteed parasite aura.
Parasite mutations don’t come from normal hatch rolls. They only come from the dedicated Parasite Egg. When the event ends, the route closes.
Path 5—Rift / Fractured
Fractured is a ~2.75x mutation tied to Rift content. Beat the Abyss Overlord, bank Boss Tokens, and buy the Mutation Consumable for 400 tokens. Some reports say you can walk out of a clear with a few tokens’ worth of shopping.
Place an unhatched egg in your pen, equip the purple crystal, and interact. Success is 10%. On a fail, the item is gone and the egg is unchanged.
Where to Stamp Your Fractured Consumable
The consumable is expensive, so don’t waste it on a trash egg. With a 10% success rate, you’ll average about 10 attempts, or roughly 4,000 tokens, per hit. Put it on the fattest Titan Temple or Angels egg you can limp home.
Path 6—Dr. Scramble / Scrambled (Live Now)
Scrambled is live right now, per the official Discord patch notes from Sept 19–20, 2026. It’s a ~2.75x mutation with a poison-like effect. Every 30 minutes, drones invade. Sword them and farm Samples.
The Experiment Shop sells the Scrambled consumable for 475 Samples, with the same 10% chance to stamp an unhatched egg.
The shop also stocks boosters, Nibbles #013 (2,950 Samples), and Experiment #001 (6,500 Samples).
The Sample Math Behind Scrambled
Players who sprint every biome during the window report 2,000+ Samples per event.
That’s about four attempts, which gives you only roughly a 34% chance of at least one success. The 10% stings, so buy extras and only stamp late-game eggs.
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Path 7—Luminous Egg (the 10x Conversation)
Luminous comes from an Angels VS Demons–era shop egg that replaced the Monster Egg slot. It’s Robux only.
Most hatches are normal pets from that pool. The spicy part is the Luminous Re-roll: a Cosmic pet becomes Secret, a Secret becomes Eternal, and the pet comes out glowing.
Robux Pricing Breakdown
| Pack | Price | Per Egg |
|---|---|---|
| 1 egg | 80 Robux | 80 |
| 3 eggs | 200 Robux | ~67 |
| 10 eggs | 640 Robux | 64 |
| 50 eggs | 2,800 Robux | 56 |
The 50-pack is the best value per egg, which is why people bulk-buy it.
What the 10x Really Means
A standard Electric Eel earns about 296M/s, while a Luminous Electric Eel earns about 3.2B/s, roughly 10.8x. A Secret Luminous Abyss Shark clocks about 2.6B/s.
Part of that jump is the rarity upgrade, not the aura alone. There’s no confirmed end date as of mid-September, but the shop is limited, so buy on your own timeline, not on hype.
Size is Half the Guide
Mutations get the screenshots. Size pays the bills. Size rolls separately at hatch and shows as kg on the card.
Community shorthand puts Giant at about 3x and Huge at about 5x, with the “can’t see the top of it” Krakens sitting even higher.
Weight Curve in Plain Words
Fandom published the curve. Pets under 125x base weight scale smoothly. Above that, the game applies diminishing returns:
- At ~100x base weight, you get ~17x base value.
- At ~200x, about 23x.
- At ~1,000x, about 45x.
Bigger still pays more, but each extra kg adds less. Size rolls are also easier to get than rare auras, so a huge Rainbow Legendary can out-earn a tiny Secret.
A small Rainbow can lose to a Huge nothing-special of a better species. Read the money/s. Always.
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Timeline So You Know What’s “Still In”
| Mutation | Status (Sept 20, 2026) |
|---|---|
| Silver, Golden, Rainbow | Always in: wild eggs, Fuse Machine, Admin Abuse |
| Scrambled | In: live with Dr. Scramble |
| Fractured | In: while the Rift / Boss Shop lives |
| Luminous | In: limited shop, no confirmed end date |
| Bloom / Spirit Bloom | Out: Sakura event not active; Admin Abuse only |
| Parasite / Monstrous | Out: event-locked to Hungry Monster / Hungry Frog |
Steal an Egg still updates roughly every weekend, so multipliers will drift. The loop won’t.
What to Chase at Each Stage
1. Everyday Grind
Rainbow on a huge late-biome pet. That’s the sustainable dream.
2. Event Window
Spirit Bloom or Parasite if you can still roll them. Fractured or Scrambled stamped onto something fat. A Luminous Re-roll if you’re buying the shop egg.
3. Flex Tier
Rainbow + Huge + a stacked Sakura aura, or a Luminous Eternal that makes your friends type “how” in the main lobby.
4. Rules That Keep Showing Up
The same advice repeats across some credible resources:
- Patrol nests after every night reset. Color-changed shells first.
- The biggest egg in the nest beats a tiny mutated egg two biomes away.
- Never put a junk egg in an incubator. Feed it your best unhatched steal.
- Never fuse a lone Rainbow with two normals.
- Fractured and Scrambled stamps belong on late-game eggs only. A 10% chance plus 400 tokens or 475 Samples is not a Forest Chicken experiment.
- If Sakura is live, stack Bloom on an already-mutated egg.
- If Admin Abuse is announced, sit in a server 15 minutes early.
FAQ: The Discords Keep Repeating
Q: Can You Add a Mutation to a Pet That Is Already Hatched?
A: No. You either hatch it already mutated, or apply a consumable or incubator to an unhatched egg in your pen.
Q: What Is the Best Mutation Right Now?
A: By raw jump, Luminous, at roughly 10x with its rarity upgrade. For everyday play, it’s Rainbow on a huge late-biome pet.
Q: Does Fusing Keep My Mutation?
A: Not reliably. Three copies sharing the same mutation give you a chance to keep it. Mixing one mutated pet with normals usually loses it.
Q: Does Size Beat Mutation?
A: Often, yes. A Huge plain pet (about 5x) beats a normal-sized Rainbow (x3.5) of the same species. The best cards have both.
Q: When Does Admin Abuse Happen?
A: Sessions have landed around Saturdays before big updates. The cap is small, often 7 eggs, so join early.
Q: How Often Do Nests Refresh?
A: After a night reset, roughly every 4.5 minutes.
Q: Is the Luminous Egg Still Available?
A: Yes, as a limited Robux shop item. There’s no confirmed end date as of mid-September.
Q: Are Bloom, Spirit Bloom, and Parasite Gone?
A: For now, yes. Sakura is not active and Parasite is event-locked. Bloom and Spirit Bloom can still appear on random eggs during Admin Abuse.
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Steal an Egg mutations come down to one loop: spot the odd egg, get it home, hatch the aura, and never feed your best pet to the Fuse Machine unless you have two more copies wearing the same paint.
Rainbow on a huge pet runs the everyday grind. Fractured, Scrambled, and Luminous are your event-window plays, and size quietly decides who wins the leaderboard.
Then, which rarest mutation have you ever hatched?
FAQs
All multiplier figures are sourced from community-measured data, including Fandom wiki tables and player-recorded results, since the developers have never released an official multiplier sheet.
Yes, mutation tier has a significant impact on earnings per second. Two creatures of the same species can have wildly different income rates depending on their mutation, with high-tier variants like the Rainbow shark far outperforming common ones like the Forest chicken.
The guide identifies top-tier mutations that generate enough passive income to fund Speed upgrades automatically, letting earnings accumulate even when you are away from the game. Consulting the full roster and odds sections will help you target the most efficient upgrade paths for your playstyle.
Running low on Robux but there is a cool limited item in the shop? Head over to Joytify and top up right away — no waiting needed.
TL;DR
- Mutations in Steal an Egg are color auras or particle effects that multiply a pet's income, and they stack with size multipliers to significantly increase earnings.
- The game features several paths to obtaining mutations, including natural rolls from wild eggs, the Fuse Machine, and event-specific routes like the Hungry Frog and Dr. Scramble.
- The most valuable mutation is Luminous, offering a multiplier of approximately 10x, while Rainbow provides around 3.5x, making them top choices for maximizing earnings.
