Auriferous Venomfang

Finish What Lies Beyond the Fog, open Achievements → Exploration → Midnight, and track Treasures of the Coiled Isle. Use Coiled Isle map 2512 for every coordinate below; loot credit is Warband-friendly, but the tracked achievement is the reliable source of truth.

Loot Possessed Vase 31.42, 83.47; Smoldering Incense 29.55, 67.21; Fangbound Sack 45.91, 66.29; Profane Ritual Spoils 43.57, 67.46 (face the altar and click objects upper-right, upper-left, bottom-right, bottom-left); Zul'jan's Stash 43.96, 26.49; Damaged Loa Trinket 46.86, 29.58; and Waterlogged Basket 49.48, 31.99.

Loot Stinking Vessel/Intact Vase 53.07, 43.10; Tarnished Amani Glaive 55.20, 37.93; Cracked Skull 58.14, 43.56; Jaktu's Cursed Blade 60.43, 59.43; Venomjade Necklace 64.70, 36.63; Ornate Bottle 66.94, 28.05; Crumbling Urn 73.49, 56.55; Forgotten Mask 64.92, 78.90; and Malfunctioning Staff 75.40, 68.35.

At 65.0, 5.9 kill Glittering Grouper Brinetail near the chest until you have 3 Diver's Key Fragments. Combine them, then open the Sunken Diver's Chest at 65.4, 5.6.

Open Bubbling Clams around 69.6, 82.5 until Luminescent Pearl drops. Place it near Nacretta at 70.6, 77.1 and loot the Dropped Key, then open the Ancient Amani/Brine-Crusted Chest at 70.6, 76.6.

Fish a Grisly Morsel from Grisly Cod Pool 73.4, 66.1 and feed it to the Hungry Dolphin at 72.5, 67.2 while staying underwater. Follow it to Waterlogged Crate 73.1, 67.0 and Broken Urn 72.4, 68.4 for both key halves, then open the cache at 71.9, 66.7.

Click Grave of Someone Forgotten at 67.3, 48.5, speak with Ru'ko at 66.4, 57.2, and follow the spirits' requests. Pick up Forgotten Trinket at 70.2, 64.5, give it to Lost Spirit at 68.0, 65.9, and loot the Forgotten Treasure.

Ask Vul'zahn for the chest at 58.2, 45.7, request stew from Witherbark Cook at 58.0, 48.8, obtain medicine from Apothecary Dezi at 57.2, 48.5, return the medicine to the cook, then bring the stew to Vul'zahn and open his chest.

Check the achievement for all 22 criteria, including Lost Spirit and Grave credit. When Treasures of the Coiled Isle completes, use the Auriferous Venomfang reward and verify the bright gold serpent in Collections.