Unknown Signal

Steps

1. Talk to Pathfinder Percival in Arcanum about an unknown signal.
2. Enchant the Attuner to the Ocean Frequency at an Enchanting Table. Use the Attuner to pick up the signal in the Beach world.
3. Show the Attuner to Pathfinder Percival.
4. Bring Pathfinder Percival:
   1. 8 Stones
   2. 1 Clam
   3. A Codex from Archivist Alistair in the Arcanum library.