Steal an Egg · Pet
Leviathan
Leviathan is a Cosmic pet in Steal an Egg that earns a base $220K/s. It hatches from the Leviathan Egg, stolen from the nests of the Lake biome.
EggLeviathan EggPet stats
Base income
$220K/s
Base weight
5,000 kg
Egg
Leviathan Egg
Grow time
25m
Speed reward
+5K
Cash reward
$22M
Source
Lake
Biome nest
Rarity
Cosmic
Where to get Leviathan
Steal the Leviathan Egg from the nests of the Lake biome, carry it back to your pen and let it hatch.
- Speed required
- 900
- Guardian
- Swan
The guardian sleeps next to the nest; the faster you are, the easier it is to outrun it. Bigger eggs are worth more but slow you down. Eggs & guardians
Estimate based on the wiki formula
Leviathan income with mutations and size
| Mutation | 1× weight5,000 kg | 10× weight50,000 kg | 100× weight500,000 kg | 200× weight1,000,000 kg |
|---|---|---|---|---|
| No mutation×1 | $220K/s | $910K/s | $3.76M/s | $5.21M/s |
| Rainbow×3.5 | $770K/s | $3.19M/s | $13.2M/s | $18.2M/s |
| Parasite×3 | $660K/s | $2.73M/s | $11.3M/s | $15.6M/s |
| Fractured×2.75 | $605K/s | $2.5M/s | $10.4M/s | $14.3M/s |
| Scrambled×2.75 | $605K/s | $2.5M/s | $10.4M/s | $14.3M/s |
| Golden×2.5 | $550K/s | $2.28M/s | $9.41M/s | $13M/s |
| Spirit Bloom×2.5 | $550K/s | $2.28M/s | $9.41M/s | $13M/s |
| Bloom×1.25 | $275K/s | $1.14M/s | $4.71M/s | $6.52M/s |
| Silver×1.2 | $264K/s | $1.09M/s | $4.52M/s | $6.26M/s |
Estimate based on the wiki formula (marked beta there): income = base × (weight ÷ base weight)^(37/60) × mutation, with diminishing returns above 125× the base weight. In-game values can differ. See mutations and the income calculator.
How Leviathan compares
Neighbors by income in Lake (8 of 8):
Earns less
Axolotl
$2.8K/s(÷79 vs Leviathan)
Other Cosmic pets
Leviathan guide
A Cosmic pet in the second biome
The Leviathan is the outlier of Lake. Every other pet there earns between $3/s and $2.8K/s; the Leviathan earns $220K/s, close to 80 times the Axolotl just below it. It is a Cosmic pet, ranked 27th of 28 in that rarity (126 of 198 pets earn more overall), and it is reachable with only the 900 Speed that Lake requires.
A 25-minute commitment
The Leviathan Egg takes 25 minutes to grow, five times longer than any other Lake egg. Since the wiki says nests reset every 5 minutes, one Leviathan egg ties up a pen slot for about five reset cycles. The payout when it hatches is +5k Speed and $22m.
That Speed reward is modest for a pet of this tier. On its own it covers half of the 10K needed for Desert, so you will still want quick Lake eggs (Frog, Catfish, Swan) running beside it.
How it compares
- Royal Sphinx, the Desert's Cosmic: $280K/s from a 30-minute egg
- Leviathan: $220K/s from a 25-minute egg
The Sphinx earns about 27% more, but the Leviathan is available a full biome earlier.
Estimated ceiling
Its base weight is 5,000 kg. With the formula the wiki documents:
- Golden: about $550K/s
- Rainbow: about $770K/s
- 10 times base weight: about $910K/s
- 100 times base weight: about $3.76M/s
- 200 times base weight: about $5.21M/s
- Rainbow at 100 times base weight: about $13.2M/s
A Golden Leviathan would outearn a plain King Mammoth ($400K/s) from Snow, which makes a mutated one a long-term pen keeper.
Data sourced from the Steal an Egg Wiki (CC BY-SA) and processed automatically; last synced 2026-10-11.