From Guild Wars 2 Wiki
Exalted Keys are used to unlock Exalted Chests, Great Exalted Chests, and Grand Exalted Chests below Tarir in Auric Basin.“
Used to open Exalted chests in Auric Basin. Chests can contain armor, weapons, and recipes.
— In-game description
|Aurillium Collector||Tarnished Treetop||96+|
|Aurillium Collector||Tarnished Treetop||5 / 4 80+|
|Exalted Mastery Vendor||Noble Ledges; Tarir, the Forgotten City||24+|
|Exalted Mastery Vendor||Noble Ledges; Tarir, the Forgotten City||5 / 1 20+|
|Ley-Energy Matter Converter||–||0|
|Priory Explorer||Tarnished Treetop||96+|
|Priory Explorer||Tarnished Treetop||5 / 4 80+|
- There is a total of 27 chests underground - 5 grand, 14 great and 8 normal chests. Since the grand chests offer the best possible drops, one should open these first.