Genshin Impact: How to Get Sunset-Blue Obsidian Ring in Atocpan (5.5 Guide)
Unlocking the Collective of Plenty tribe in Atocpan (Natlan) requires obtaining the Sunset-Blue Obsidian Ring by collecting three fragments from chests. This guide covers all Precious & Luxurious Chest locations to help you remove the Obsidian Barrier.
How to Get the Sunset-Blue Obsidian Ring

Explore Atocpan and open Precious/Luxurious Chests (fragments drop randomly).
Collect 3 Sunset-Blue Obsidian Fragments.
Combine them in your inventory to create the Sunset-Blue Obsidian Ring.
Use the ring to unlock the Collective of Plenty's barrier.
⚠️ Note: Some chests are locked behind quests, puzzles, or enemy fights.
All Precious Chest Locations in Collective of Plenty
Quest-Related Chests

**#1-2:** Complete Investigator of Ancient Ruins + defeat enemies.
**#3:** Finish A Brief History of Rocks quest.
**#6:** Complete Runtuma's Challenge (southwest Atocpan).
**#7:** Find all Urumbamba's missing baby saurians.
**#12-14:** Finish "Is Intensity Really The Key?" + defeat 3 master trainers with SS-rank.
Enemy-Drop Chests
**#4:** Defeat Stonehide Lawachurl + enemies near southeast pond.
**#5:** Beat Fatui & Warrant Officer Tatiana (west of Remnants of Tetenanco).
**#8:** Clear Hilichurl Camp (south of Urumbamba).
**#9:** Complete Kerih's Challenge (south of Stadium of the Sacred Flame).
**#10-11:** Finish Matador Monotoo Challenge.
All Luxurious Chest Locations in Collective of Plenty

**#1:** Place That Which Was Once Ehecatl (from Summoning Hall) in Fallingstar Fields ruins.
**#2:** Defeat Secret Source Dragon Idol (southwest Atocpan) → teleports you to an island for another fight.
**#3:** Help the Dragon Idol in a lava pond (east of tribe).
**#4-5:** Unlock the remaining Shrines of Depths in Atocpan.
Tips for Farming Fragments
🔹 Prioritize quest-related chests (higher fragment drop chance).
🔹 Use interactive maps to track unopened chests.
🔹 Defeat all elite enemies—they often guard rare chests.
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