Allegiance to the Old Gods
Bring the Damp Note found on a naga priestess to Je'neu Sancrea.
Bring the Damp Note found on a naga priestess to Je'neu Sancrea.

The note is a random drop, so keep an eye on loot from every Tide Priestess.

Lorgus Jett does not always stand in the same spot, so check the Twilight's Hammer area carefully.
Loot Damp Note in Blackfathom Deeps and right-click it to start the quest. Horde: Je'neu Sancrea in Ashenvale (11.6, 34.3).
Horde: Je'neu Sancrea in Ashenvale (11.6, 34.3). Horde: Je'neu Sancrea in Ashenvale (11.6, 34.3).
Horde: experience only, 1,300 XP. Horde: Band of the Fist, Chestnut Mantle, 6,300 XP.
Allegiance to the Old Gods is a level 22 quest; you can pick it up from level 17. It takes you into Blackfathom Deeps.
All Blackfathom Deeps quests on one map ·Blackfathom Deeps dungeon guide
Sources: Quest data from ForeverDB.net · ForeverDB: Blackfathom Deeps · ForeverDB: Every dungeon quest for the level 20 to 30 dungeons · ForeverDB: The Orb of Soran'ruk · ForeverDB: Seeking the Kor Gem · ForeverDB: Baron Aquanis · Warcraft Wiki: Blackfathom Deeps (Classic)