This large device was discovered by Artemis and Elec in the bottom of the hold of the SpellJamming ship The Axe. It’s unclear what the device is or was intended to do. When Elec his the giant green button on the device it caused the ship to crash land on an unknown planet, where they discovered The Walker.
The device is clearly of Gnomish design, and would not fit through any of the doors into the room is was contained in. But why an Orc raiding ship would have an unknown, possibly powerful Gnomish device built inside it is unclear.