Scourge of Zem'lan

Head to the Port of Zem'lan in Vol'dun. This achievement is available at all times and does not require a world quest to be active.

Locate and use a Pirate Hat in the center and south-west part of the port, found near at 33.77, 78.76, at 34.13, 78.35, at 34.73, 80.14, or in the general area at 35.2, 79.8. Using it grants you the Thirst for Adventure buff for 10 minutes. Items of the same type share an instant respawn cooldown, and at least one is always available.

Locate and use Zem'lan Blackeye Brew in the south-east part of the port, found in buildings at at 36.8, 79.9, at 37.08, 79.98, at 37.1, 79.9, or in a chamber at 37.13, 78.11. Using it grants you the Thirst for Brew buff for 10 minutes.

Locate and use a Treasure Map in the north part of the port, found in a chamber at 35.8, 76.65, on a wall at 34, 76.75, or in the area around at 34.9, 76.6. Using it grants you the Thirst for Treasure buff for 10 minutes. Maps can appear on walls or inside buildings.

Once all three buffs — Thirst for Adventure, Thirst for Brew, and Thirst for Treasure — are active simultaneously, Ol' Bonebite will spawn and follow you. Note that none of the objects glow or show an outline, so you must spot them visually.

Kill 20 pirates in the Port of Zem'lan while Ol' Bonebite accompanies you. Do not die, leave the area, or allow any of the three buffs to expire, as doing so will cause Ol' Bonebite to despawn and require you to collect all three buffs again. Be aware of the Eternal Curse of Zem'lan debuff, which increases damage taken by 10%.