In the Stormlands Zone of Steal an Egg you can get Storm Glass to activate the Storm Conductor Machine. You can get Storm Glass by breaking a special glowing Rock during the Skyfall event which happens every half an hour. Once you have three Storm Glass, you can activate a Storm Rush during which you can grab Sparks, then trade them for the Thunderous Mutation.
Stormlands is an early to mid Zone in Steal an Egg set after the Prehistoric Zone. It was added in the Slick Rick update to allow for some additional mid-game progression, but it also added some secrets that would be interesting to endgame players. If you've found the Storm Conductor in Steal an Egg but don't know how to get the Storm Glass to activate it, this is where our guide comes in.
Where is the Storm Conductor in Steal a Glass?
First, to actually activate the Storm Conductor, you need to know where it is in Steal an Egg. From the spawn zone head to the zone after Perhistoric, the Stormlands. Here to your left, you will see a cave that you can enter. You don't need to find anything to open it like you do with the Alien Planet Gate.
Once inside, you'll see the Rumble NPC as well as the Storm Conductor. Your goal is to activate the Storm Conductor so that you can grab Sparks. You can trade 150 Sparks for a Thunderous Mutation with Rumble. So how do you activate the Storm Conductor?
How to Get Storm Glass in Steal an Egg

In order to activate the Storm Conductor in Steal an Egg, you first need to get Storm Glass. You can do so only during the Skyfall event in the Stormlands.
When this event is active, rocks will fall from the sky. Equip your bat and start hitting the rocks. However, in this case, you are looking for one specific rock that looks larger and has lightning across it. It will also take you longer to break it, but when you do, you will get the Storm Glass in Steal An Egg.
The Skyfall event happens every half an hour and you can only find one Storm Glass during each event. You do need three to activate the Storm Conductor, so you can either ask around the server if anyone else has one, or you can wait after three events pass to get three Storm Glass to put into the machine. All rocks are visible only to you, so each player on the server can see their own rocks, which means no one can steal the Storm Glass from you.
When you have three Storm Glass, go inside the cave and place them all into the Storm Conductor to activate the machine. If you leave the cave without placing all three, they will automatically be back in your inventory.
How to Get Sparks in Steal an Egg

You need to get 150 Sparks in order to trade for the Thunderous Mutation in Steal an Egg. You can get Sparks by activating the Storm Conductor with our instructions above. When you do, a Storm Rush will start that lasts for a minute during which you can catch Sparks.
The Storm Rush happens in three waves. During the first, you can grab basic white Sparks with the value of one. During the second wave of Storm Rush, you can get Pink Sparks which are worth three Sparks. Finally, during the third wave, you can get Golden Sparks worth 5 Sparks. These are the ones you want to go for in those final seconds of Storm Rush.
How to Get the Stormy Egg in Steal an Egg

The Stormy Egg is a limited event Egg which is available in Steal an Egg until November 21, 2026 when the Thanksgiving event starts. You can get this egg in the Stormlands Zone for a specific currency. It's not Sparks, but rather 200 Rock Fragments. You get these during the Skyfall event just by breaking down rocks.
Any rock will give you a couple of Rock Fragments, so make sure to keep breaking them all. You can usually get around 150 Rock Fragments per Skyfall event. In the Stormy Egg, you can these limited Pets:
- Legendary Stormstring - $22.5K/s
- Legendary Nimbus - $35K/s
- Mythic Sparkfield - $160K/s
- Cosmic Cloudcurler - $6M/s
- Secret Stormflutter - $700M/s
- Eternal Stormlord Titan - $5B/s
If you want better eggs, make sure to check how to complete Steal an Egg Enchanted Forest Wisp quest here on Pro Game Guides!