1,750 Void Pearls · Alien Lagoon · 30%. Apply to an egg. ×2.5

Dark Matter mutation icon in Steal an Egg
Update 13

Thunderous Mutation in Steal an Egg

In the Stormheart Cave in Stormlands, trade 150 Sparks with Rumble at the Thunder Trade-In for one Thunderous Mutation. Put 3 Stormglass into the Storm Conductor to start a Storm Rush, then fly to collect Sparks.

Cost per consumable 150 SparksApplication chance UnconfirmedIncome multiplier ×2.75
Thunderous Mutation crystal with white lightning, blue rings and clouds.

A successful application gives a ×2.75 income multiplier. The application chance is still unconfirmed.

Skyfall and Storm Rush guide · How do mutations work in Steal an Egg?

Thunder Trade-In panel showing the exchange of 150 Sparks for 1 Thunderous Mutation.
Thunder Trade-In panel showing the exchange of 150 Sparks for 1 Thunderous Mutation.