Mutations Guide: All 7 Multipliers & How to Get Them - Steal An Egg

What mutations exist and what do they multiply?

Mutations are income multipliers attached to an egg before it hatches. The game currently runs seven, and the multiplier applies to the pet’s base income for as long as you own it. Three come from ordinary nest spawns, two from the Sakura Incubator, and two from event content.

How do I get Silver, Golden and Rainbow eggs?

They appear randomly on nest spawns in every biome, from Forest onward, and the shell colour changes before you pick the egg up. There is no way to force one; you take mutated eggs whenever you see them. Because the multiplier applies to base income, a Rainbow egg from a higher biome is always worth more than a Rainbow egg from a lower one — check the all eggs list for which zone to camp.

Admin Abuse events occasionally hand out mutated eggs directly without the normal roll, so watch the game’s Discord announcements for those windows.

How does the Sakura Incubator work?

The Sakura Incubator sits in the Cherry Blossom biome, which needs 2.5B Speed to enter. You place an egg in it, power it with Sakura Crystals, and it applies Bloom (1.25x) or, at about a 2.5% chance, Spirit Bloom (2.5x) before the egg hatches. Because the mutation is applied pre-hatch, feed it your best unmutated egg — an Oni Tiger or a Cosmic-tier egg — not a spare Common. Getting there is a Speed problem; the route is laid out in the speed guide.

Where do Parasite and Fractured come from?

Neither appears through normal hatching. Parasite is a Monster Chest reward from the Monster update event, reported at roughly a 1.5% chest rate. Fractured arrived with the Rift content and comes from the Mutation Consumable in the Rift Boss Shop (400 Boss Tokens). Each consumable gives the egg it is used on a 10% chance to hatch Fractured, so budget about ten per success. Both are worth chasing when their events are live, because at 3x and 2.75x they beat everything except Rainbow — and unlike Rainbow, you can plan for them.

Do mutations stack with size?

Yes. Size (up to Huge) and mutation are independent attributes and both multiply base income. A Huge Rainbow pet gets the Huge bonus and the 3.5x together, which is how a mutated lower-rarity pet can outperform a plain pet a full tier higher — see pet rarities for the tier bands.

Do two mutations stack with each other?

They add rather than multiply. The combined factor is 1 + (m1 − 1) + (m2 − 1): a pet carrying both Golden and Rainbow earns 1 + 1 + 2.5 = 4.5x base, not 2 × 3.5 = 7x. The Pen slot optimizer applies this rule when ranking your pets.

Can I lose a mutation by fusing?

You can. The Fuse Machine combines three copies of a pet into a higher-rarity one, and fusing a mutated copy with plain copies risks the result coming out unmutated. Keep mutated pets in your Pen and fuse only un-mutated duplicates. The safe procedure is in the fuse machine guide.

Which mutation should I chase first?

Early and mid game, Rainbow is the best mutation you can realistically obtain — it spawns naturally and gives 3.5x. Golden (2x) is the everyday win. Spirit Bloom is the end-game Cherry Blossom target, and Parasite / Fractured are event windows to plan around. For priority order across your whole Pen, use the pet tier list.