Mutations

Hatch colours (auras)

Every hatched pet has a chance to roll a colour aura — Silver, Golden or Rainbow. It is the same dice roll for every pet in every biome: a single roll can land at most one aura, and most hatches land none.

Applied mutations

Applied mutations are not part of the normal hatch roll. Each comes from a specific source — an incubator, a consumable, an event shop or its own dedicated egg — and can be stacked on top of whatever aura the pet already rolled.

Size is independent of colour. Every hatch rolls a weight in kg separately from the aura, which is why the same pet can appear as a plain Huge or as a Golden Giant. Weight has a major effect on final income, and larger rolls keep adding value even past the point where each extra kg is worth less.

Below 125x the pet's base weight

Above 125x the pet's base weight (diminishing returns kick in)

What the numbers mean

• 100x base weight is worth roughly 17x base value
• 200x base weight is worth roughly 23x base value
• 1000x base weight is worth roughly 45x base value

The exponents (37/60, 2/5) and the 125x soft cap are the community's fitted values — the exact in-game formula is not published.

Steal An Egg does not publish an official income table — every multiplier below is community-measured and changes with balance patches. Treat these as the community consensus, not official numbers.

Known conflicts we track: Spirit Bloom (2.5x here, some outlets list 3x) and the stacking rule (additive vs multiplicative) — both flagged in the tables above rather than silently resolved.