Magma Orb

The Magma Orb is an item in Golden Sun: Dark Dawn. It is an orb that is located inside the belly of a Mountain Roc, and is the only item that can be used to reactivate the Alchemy Dynamo inside the Belinsk Ruins, causing the Grave Eclipse. Matthew and co. are tricked into retrieving this orb (although Ryu Kou ultimately ends up getting it) by Blados and Chalis.