Dusk and Dawn: The Awoken of the Reef #15. Found on The Tangled Shore in Hall of the Exalted, access from Jetsam of Saturn.
The Darkness: The Forsaken Prince #18. At the end of the Lost Sector in Four-Horn Gulch.
Dusk and Dawn: The Awoken of the Reef #20. Found on Io in the Lost Oasis Lost Sector “Grove of Ulan-Tan“.