Multipliers

Steal An Egg mutations and sizes

Two things push a pet's income up: its mutation (its visual effect) and its size (its weight). The two multiply together.

Rainbow

x3.5

Random roll on hatch, very rare: 1 in 100.

Its colors keep changing.

Parasite

Never a random roll: comes from the infected eggs (Parasite Eggs) of the Hungry Frog event.

A parasite clings to the pet.

Fractured

x2.75

Never a random roll. You get it with a mutation shard from the Rift Boss Shop (10% success) or as a reward for beating the boss again and again (boss mastery).

The pet looks cracked.

Scrambled

x2.75

Dr. Scramble's Experiment Shop (10% success).

A toxic, poison-like effect.

Enchanted

x2.75

Never a random roll. You get it with an Enchanted Essence, crafted from butterflies at the altar hidden inside the big tree of the Enchanted Forest: put it on an egg before it hatches and the mutation always applies. The game does not show the multiplier: x2.75 was measured in game on October 8 (a 19 kg Bird at $102/s, x2 Money pass included).

The pet turns fully turquoise, with glowing sparkles around it.

Nitro

x2.75

Never a random roll. You get it with the Nitro consumable from the Nitro Race shop (Update 8), paid with race trophies: 10% success per try.

In-game look not checked yet (the icon is the one from the race shop).

Golden

x2.5

Random roll on hatch: 4 in 100.

Shiny gold with coins flying off.

Spirit Bloom

x2.5

Sakura Incubator during the Cherry Blossom event (5% chance, 10% when the incubator is fully charged), or random eggs during Admin Abuse. Not available right now.

A green spirit aura.

Bloom

x1.25

Sakura Incubator during the Cherry Blossom event, or random eggs during Admin Abuse. Not available right now.

Cherry blossom petals.

Silver

x1.2

Random roll on hatch: 6 in 100.

Shiny silver reflections.

Several mutations on one pet

A pet can carry several mutations at once, and their bonuses add up: add each mutation's bonus to the normal 100%. Golden + Rainbow therefore gives x5, not x8.75.

At hatch, a pet can get two: after a first mutation, the game tries a second roll half of the time. Event mutations (Parasite, Fractured, Scrambled, Enchanted, Nitro, Spirit Bloom, Bloom) are added on top. The calculator and the mini-calculator on pet pages accept several mutations.

Mutations on the same pet	Income multiplier
Silver + Golden	x2.7
Golden + Rainbow	x5
Golden + Parasite	x4.5

Size matters too

Every pet has a base weight. The real weight, shown in kg on its card, depends on the size of the stolen egg, with some luck involved, and has nothing to do with the mutation. The heavier it is, the more it makes, but the gain slows down for huge pets. You can read that weight before it hatches: it is the one shown on the egg in your inventory.

No need to do the math: the table below and the calculator do it for you. For the curious, the formula found by the community: up to 125 times the base weight, income is multiplied by (weight ÷ base weight) to the power 37/60. Beyond that, the bonus grows more slowly.

Weight vs base weight	Income multiplier	Example: Unicorn (1,200 kg base)
x1	x1	1,200 kg: $1B/s
x2	x1.53	2,400 kg: $1.53B/s
x5	x2.7	6,000 kg: $2.7B/s
x10	x4.14	12,000 kg: $4.14B/s
x25	x7.28	30,000 kg: $7.28B/s
x50	x11.2	60,000 kg: $11.2B/s
x100	x17.1	120,000 kg: $17.1B/s
x125	x19.6	150,000 kg: $19.6B/s
x200	x23.7	240,000 kg: $23.7B/s
x500	x34.2	600,000 kg: $34.2B/s
x1000	x45.1	1,200,000 kg: $45.1B/s

Example

A Golden Unicorn (x2.5) that weighs 10 times its base weight makes $1B/s × 2.5 × 4.14 = about $10.3B/s. Do the math for your pets with the calculator.

Formula and odds published by the community wiki: the game does not show them, so results are estimates. Stacking of mutations: game code export published by stealanegg-wiki.com.