The Vaults of Atal'Utek
Unsolved Mysteries
While powers are allocated with Spirit Corrosion points gained by donating Corrosive Coins to Er'inye, several of the talents are locked until certain objectives have been completed. These objectives are four hidden quests, which must first be discovered by finding their respective key and unraveling a short mystery.
For example, the Excising Knife is one of the easiest to get, automatically obtained upon completing a Temple Incursion within the Vaults, but it doesn't do anything alone. Taking it to Er'inye will give you a hint, though the mystery is yours to solve. Luckily, the helpful players in our comments have already figured them out, so you can skip the guesswork.
Relics of the Vault
Though obtained in different ways, each of the four relics have a similar solution: bring the item to a specific location, which will allow players to loot a new container holding the actual quest item. Turning the quest into Er'inye will then unlock the corresponding talent node within the Altar of Corrosion.
Key SourceLocationContainerQuest ItemUnlock
Spirit LoupeDefeat an Ancient Foe, which spawns after completing a Temple IncursionFind the Feather of Tok'jara just below the eastern brazier at the stairs to the Venomous Abyss raid entrance
/way #2509 48.50 25.76 Feather of TokjaraFeather of Tok'jaraSpectral Winds
Excising KnifeComplete a Temple IncursionFind the Eye of Szarith in a venom pool inside the Underbelly
/way #2509 47.1 6.4 Underbelly entrance
/way #2613 68.60 15.66 Eye of SzarithEye of SzarithBroodmaster
Dispelling CharmLoot from the Spirit of Jin'tal during the The Honored Med'jai quest lineFind the Jin'tal's Reliquary on a shelf inside the Profaned Mausoleum
/way #2638 36.26 23.70 Jin'tal's ReliquaryLost Med'jai AmuletSpiritual Protection
Corroded KeyComplete Temple StrikesFind the Venom-Worn Coffer in various locations around Venom waterfalls
Possible locations
/way #2509 41.6 53.5 Venom-Worn Coffer
/way #2509 52.55 53.83 Venom-Worn Coffer
/way #2509 47.43 37.4 Venom-Worn Coffer
/way #2509 53.9 18 Venom-Worn Coffer
/way #2509 42.41 11.99 Venom-Worn CofferMummified Lynx's PawRun of the Vaults
