In Roblox’s Steal an Egg, four event mutations can be stacked onto a single egg before it hatches: Nitro, Scrambled, Fractured, and Enchanted. On a Divine Royal Skywhale, one of the largest pets in the game, that stack produced a 1,482,789kg pet earning $460B per second. That single pet raised the base’s offline earnings to $12Qa a day.
Quick answer: Apply Nitro, Scrambled, Fractured, and Enchanted to an egg in your pen before hatching. Each applied mutation shows its own “mutation applied!” message, and the hatched pet’s name lists all four.
The four mutations in the Steal an Egg stack
None of these four mutations appear through normal hatching. Each one comes from a consumable earned in a separate limited event. That is what makes a four-way combination rare. Three of them are coin flips weighted heavily against you, and the fourth takes a long grind.
| Mutation | Multiplier | Apply chance | Event source |
|---|---|---|---|
| Nitro | x2.75 | 10% | Nitro Race |
| Scrambled | x2.75 | 10% | Dr. Scramble (Experiment Shop) |
| Fractured | x2.75 | 10% | Rift Boss (Boss Shop) |
| Enchanted | ~x2.8 | 100% | Butterfly Bloom (Enchanted Essence) |
Win the Nitro Race to receive Nitro consumables. Dr. Scramble’s drones drop Samples, which you can spend on Scrambled consumables. Boss Tokens come from defeating the Overlord in the Rift Boss event and can be exchanged for Fractured consumables. Enchanted is the sole guaranteed type. Craft Enchanted Essence at the Enchanted Mutation Shrine inside the Enchanted Tree; it requires 240 Emerald; 115 Sapphire; 40 Amethyst; plus 1 Radiant Butterfly. Players catch the butterflies in the Butterfly Bloom, held at minute 15 and minute 45 of each hour.
Rainbow has the highest single multiplier in the game at x3.5. It only comes from hatch rolls, specially colored eggs, or Saturday Admin Abuse events, though, so you can’t add it to an egg you already own. The four event mutations are the ones you can deliberately pile onto one egg.
The Enchanted multiplier is a community estimate rather than a confirmed figure, and every multiplier in the game can change with future updates.
How a quad-mutated egg comes together
Every egg in the run starts in a high-tier world nest. The player hits the “Steal” prompt in a late biome like Enchanted Forest, then has to carry the egg back through the earlier biomes to base. A red “RUN!!” banner stays at the top of the screen the whole time. Getting tagged on the way back means losing the egg. Reaching home brings up “You stole an EGG!”
At base, the egg goes into the incubation pen, and its growth timer shows in the Growing Eggs menu. Mutations go on while the egg sits in the pen, before it hatches. The footage applies them one after another in a fixed order: Nitro, then Scrambled, then Fractured, and finally Enchanted.
Each mutation that lands triggers its own banner: “Nitro mutation applied!”, “Scrambled mutation applied!”, “Fractured mutation applied!”, and “Enchanted mutation applied!” Those four messages are the confirmation. Because Nitro, Scrambled, and Fractured each carry only a 10% chance, a clean run of all three normally means burning through several consumables of each type.
Divine Royal Skywhale with all four mutations
The Divine Royal Skywhale Egg doesn’t sit in a nest waiting for you. It appears as a server-wide spawn, announced with the alert “A Divine Royal Skywhale Egg spawned in Enchanted Forest!!” That turns it into a race. The egg is huge, glows, and has to be hauled across the biomes to the safe zone like any other steal.
Once it reached the pen, the Skywhale egg got the same four-mutation treatment. It hatched as “Nitro + Scrambled + Fractured + Enchanted Royal Skywhale,” a Divine pet weighing 1,482,789kg and generating $460B/s. Equipping it pushed offline income from $9.5Qa/Day to $11Qa/Day, then to $12Qa/Day.
A separate Royal Skywhale hatch, built with Silver, Scrambled, and Enchanted instead, reached $534.2B/s on its own. Buying the x2 Money gamepass for 320 Robux then doubled that to roughly $1T/s. So a three-mutation Skywhale can out-earn a four-mutation one, which shows how much the size roll and gamepass bonuses shape the final figure.
Quad-mutated pets compared: Starry Fox, Pegasus, Royal Skywhale
The same four mutations went onto three different eggs in one session. That makes it easy to see how much of the result comes from the stack and how much comes from the pet underneath it.
| Pet | Rarity | Weight | Income |
|---|---|---|---|
| Starry Fox | Secret | 321,674kg | $149.1B/s |
| Pegasus | Eternal | Not shown | $251B/s |
| Royal Skywhale | Divine | 1,482,789kg | $460B/s |
Starry Fox came from an Enchanted Forest nest. It is the smallest of the three and earns the least, despite having an identical mutation stack.
Pegasus hatched from a glowing gold egg grabbed after a run through Cosmic, Cherry Blossom, and Angels & Demons. Its Eternal rarity puts it between the Fox and the Skywhale.
Royal Skywhale is the Divine top end. It is more than four times heavier than the Fox but earns about three times as much, which matches how income scales with weight.
Why weight still caps a mutation stack
Pet income in Steal an Egg combines two separate factors. Base income is scaled by the pet’s weight relative to its hidden base weight, then multiplied by its mutation multipliers. Mutations apply a flat multiplier, so the same stack gives every pet the same proportional boost. Weight decides what that boost is multiplied against.
Weight does stop paying off as quickly at extreme sizes. Above 125 times a pet’s base weight, the game applies diminishing returns. A pet at 100x base weight earns about 17x base value, at 200x about 23x, and at 1000x about 45x. Heavier still means richer, but each extra kilogram counts for less.
That is why the quad stack matters most on a pet that is already big and rare. Four event mutations on a Starry Fox produce an impressive card. The same four on a Divine Royal Skywhale moved a base into the quadrillions per day.
