Steal an Egg · Pet
Ankylosaurus
Ankylosaurus is a Mythic pet in Steal an Egg that earns a base $120K/s. It hatches from the Ankylosaurus Egg, stolen from the nests of the Prehistoric biome.
EggAnkylosaurus EggPet stats
Base income
$120K/s
Base weight
2,500 kg
Egg
Ankylosaurus Egg
Grow time
5m
Speed reward
+330K
Cash reward
$12M
Source
Prehistoric
Biome nest
Rarity
Mythic
Where to get Ankylosaurus
Steal the Ankylosaurus Egg from the nests of the Prehistoric biome, carry it back to your pen and let it hatch.
- Speed required
- 18M
- Guardian
- T-Rex
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
Ankylosaurus income with mutations and size
| Mutation | 1× weight2,500 kg | 10× weight25,000 kg | 100× weight250,000 kg | 200× weight500,000 kg |
|---|---|---|---|---|
| No mutation×1 | $120K/s | $496K/s | $2.05M/s | $2.84M/s |
| Rainbow×3.5 | $420K/s | $1.74M/s | $7.19M/s | $9.95M/s |
| Parasite×3 | $360K/s | $1.49M/s | $6.16M/s | $8.53M/s |
| Fractured×2.75 | $330K/s | $1.37M/s | $5.65M/s | $7.82M/s |
| Scrambled×2.75 | $330K/s | $1.37M/s | $5.65M/s | $7.82M/s |
| Golden×2.5 | $300K/s | $1.24M/s | $5.13M/s | $7.11M/s |
| Spirit Bloom×2.5 | $300K/s | $1.24M/s | $5.13M/s | $7.11M/s |
| Bloom×1.25 | $150K/s | $621K/s | $2.57M/s | $3.55M/s |
| Silver×1.2 | $144K/s | $596K/s | $2.46M/s | $3.41M/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 Ankylosaurus compares
Neighbors by income in Prehistoric (3 of 8):
Other Mythic pets
Ankylosaurus guide
Prehistoric's Mythic slot belongs to the Ankylosaurus, a $120K/s earner whose egg grows in 5 minutes. It is the pet that bridges the cheap start of the zone, the Dodo and Pterodactyl, and its Cosmic-tier dinosaurs.
Steps to hatch one
- Reach 18M Speed so you can enter Prehistoric, the 8th biome.
- Grab an Ankylosaurus Egg from the nests guarded by the T-Rex. Nests refill every 5 minutes.
- Let it grow for 5 minutes in your pen.
- Collect the hatch reward: +330k Speed and $12m.
Compared with the ocean's Mythic
The Orca, the Mythic of Abyss Ocean, earns $80K/s and takes 6 minutes. The Ankylosaurus earns 50% more and grows a minute faster, so once you can enter Prehistoric it is a straightforward upgrade for that rarity. Within Mythic pets as a whole it ranks 12th of 23, and 66th of 198 overall, counting from the lowest.
The $12m reward is more than double the Celebrity Treadmill's $5M price, and about a tenth of the Golden Treadmill ($120M).
Weight and mutation estimates
Base weight is 2,500 kg. Following the formula documented on the wiki, which it still marks as beta:
- Golden: about $300K/s
- Rainbow: about $420K/s
- 10× base weight: about $496K/s
- 100× base weight: about $2.05M/s
- Rainbow and 100× weight: about $7.19M/s
A 100× Ankylosaurus would already outearn an ordinary Triceratops ($1.2M/s).
Rift and Laboratory
The Ankylosaurus is a Medium-tier requirement for the Riftbeasts and Shattered Rift sacrifices, and the Biohazard Laboratory banner asks for it as the Prehistoric egg's Mythic.
Data sourced from the Steal an Egg Wiki (CC BY-SA) and processed automatically; last synced 2026-10-11.