From Guild Wars 2 Wiki
Hint: Use the Gloominator to capture the gloom while in the Lair of the Coil in Timberline Falls.
— In-game description
- Use your Gloominator in Lair of the Coil while floating in the small opening in the water above the school of barracudas, above a large skeleton.
- Can be reached from Okarinoo underwater.