Piece of the Orb of Rathmus

Pieces of the Orb of Rathmus are found from the Buried Objects in Stormshroud Peak in Thaldraszus after uncovering the Titan-Inscribed Tablets while searching for clues in A Sphere in Danger during Secrets of Azeroth.

Each cave on Stormshroud Peak west of the Temporal Conflux contains a Titan-Inscribed Tablet. Walk around with the Torch of Pyrreth out and it will channel at a tablet. It may take a few times walking back and forth for it to properly trigger.

At in the south cave, equip the Torch of Pyrreth and interact with the tablet in the back of the cave. It reads:

Reset the cap and navigate to (-7, 9) or to find a Buried Object nestled against a tree. It contains a Piece of the Orb of Rathmus.

Combine all three parts to combine the Orb of Rathmus, which starts A Curious Orb.