Volcano Biome in Steal An Egg: Speed Requirement, Eggs & Pets

What is the Volcano biome?

Volcano is the sixth zone, gated at roughly 700K Speed, and the best hatch-value biome in the mid-late game: its pool holds two Eternals — Phoenix ($85M/s) and Lava Dragon ($100M/s) — plus the Secret Cerberus at $8M/s. No other main zone below Cosmic puts three slots above $8M/s.

Volcano egg pool

What should I do in Volcano?

Farm it hard — Volcano’s hit rate on $8M+ pets funds the ~2.5M Speed push to Abyss Ocean faster than re-rolling Snow. The guardian — Cerberus (listed as Hellhound by some sources) — is tuned to the gate, so keep your trail tier current (trails guide) and bank eggs on the reset cycle. Progression context: biomes overview.