Secret

Cosmic Skeleton Boss

Cosmic Skeleton Boss is a Secret Steal An Egg pet with a base income of $45M/s. It hatches from an egg stolen in the Cosmic biome (recommended speed: 700M), guarded by the Cosmic Skeleton.

Base income: $45M/s
Base weight: 1,000 kg
Rarity: Secret
Biome: Cosmic
Egg: Cosmic Skeleton Boss Egg
Time to hatch: 2h 30m
Availability: AvailableNests of the Cosmic biome
Release: Game launch (July 25, 2026)
Rarity score: 128as rare as 128 Common pets (Secret)
Hatch reward: +1.6M speed and $4.5B

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How much does your Cosmic Skeleton Boss make?

Enter its weight in kg (the one on its card, or the one shown on its egg before it hatches: it is the same) and its mutations.

Income by mutation

Mutation	Bonus	Income (base weight)
No mutation	x1	$45M/s
Rainbow	x3.5	$158M/s
Parasite	x3	$135M/s
Fractured	x2.75	$124M/s
Scrambled	x2.75	$124M/s
Enchanted	x2.75	$124M/s
Nitro	x2.75	$124M/s
Golden	x2.5	$113M/s
Spirit Bloom	x2.5	$113M/s
Bloom	x1.25	$56.3M/s
Silver	x1.2	$54M/s
Golden + Rainbow (stacked)	x5	$225M/s

What is Cosmic Skeleton Boss worth?

Cosmic Skeleton Boss's money value is $45M/s at base weight with no mutation, and its rarity score is 128 (available). A mutation multiplies that value, up to $158M/s with Rainbow (x3.5); several mutations add up, and a heavier Cosmic Skeleton Boss is worth more.

Pets worth about the same: Cosmic Dragon ($60M/s), Mawbreaker ($60M/s), Mecha Scorpio ($45M/s), Scorched Dragon ($35M/s).

There is no official value list: for a real offer, put it in the trade calculator, which tells you if the trade is a win, fair or a loss (W/F/L). Every pet's value: the value list.