Steal An Egg IndexRoyal Sphinx in Steal An Egg
Cosmic · wiki data synced Oct 24, 2026
Royal Sphinx is a Cosmic pet that earns $280K/s at its base size of 4,000 kg. It hatches from eggs stolen in Desert, where about 1 in 75 eggs is a Royal Sphinx egg (1.327147%).
It is #158 of 236 pets by base income, and #1 of 8 in Desert.
- Rarity
- Cosmic
- Base income
- $280K/s
- Base size
- 4,000 kg
- Zone
- Desert
- Speed needed
- 10K
- Egg
- Royal Sphinx Egg
- Drop chance
- 1.33%
- Grow time
- 30m
- Reward
- +18k Speed, $28m
How to get Royal Sphinx
Train until you have at least 10K Speed, then go to Desert, zone 3 of 14, guarded by the Scorpion. Steal eggs there and bring them back to your base to hatch.
Each egg that spawns in Desert has a 1.327147% chance to be a Royal Sphinx Egg. That means you need to see about 52 eggs for a 50% chance of at least one, and 173 eggs for 90%.
A Royal Sphinx egg takes 30m to hatch, and the wiki lists its reward as +18k Speed, $28m.
Royal Sphinx value by size and mutation
Income grows with weight but slows down past 125× the base size. These are the wiki's formula at three sizes:
| Size | Normal | Golden ×2.5 | Rainbow ×3.5 |
|---|---|---|---|
| 4,000 kg (base) | $280K/s | $700K/s | $980K/s |
| 40,000 kg | $1.16M/s | $2.9M/s | $4.05M/s |
| 400,000 kg | $4.79M/s | $12M/s | $16.8M/s |
Work out your own Royal Sphinx: open it in the income calculator. All multipliers are on the mutations page.
How Royal Sphinx compares
By base income Royal Sphinx is #158 of 236 overall and #34 of 36 Cosmic pets. Just above it: Hooded Gerbil ($300K/s); just below: Light Dove ($225K/s).
Other pets in Desert
| Pet | Rarity | Base $/s | Drop chance |
|---|---|---|---|
 Jerboa | Common | $6/s | 26.6% |
 Fennec | Uncommon | $18/s | 20.5% |
 Camel | Rare | $75/s | 15.3% |
 Tob Tobi Tob Tob | Epic | $325/s | 12.3% |
 Snake | Legendary | $3.6K/s | 9.2% |
 Sand Spider | Mythic | $16K/s | 8.18% |
 Scorpion | Mythic | $18.5K/s | 6.65% |
| Royal Sphinx | Cosmic | $280K/s | 1.33% |
Source: Royal Sphinx on the Steal An Egg Wiki (CC BY-SA). First listed on the wiki Sep 4, 2026, during the Monsters Are Coming week. Synced Oct 24, 2026.