Information about Vessels in Diablo Immortal, including what do Vessels do, where to find them, and how to install them in the Legacy of the Horadrim and how to upgrade them by clearing Iben Fahd’s Sanctum.
What are Vessels?
Vessels are yet another variety of suspiciously gem-like objects that be be used to boost your attributes, although in the case of Vessels this is largely restricted to secondary attributes (much like the bonuses given by Normal Gems), and is done not by socketing into primary or secondary gear, but by installing Vessels into the Legacy of the Horadrim.
Where Can You Find Vessels?
Vessels are unique items that drop under specific circumstances. One is found at the conclusion of the main questline, one is found by defeating [Lassal the Flame] during an 8-player [Helliquary Raid], another is a random drop from chests at the end of the Sanctum Depths dungeon in Iben Fahd’s Sanctum, but the vast majority are obtained as rewards for defeating world bosses in [Hell Difficulty] following the conclusion of the main questline.
Your first, however, will likely come when you complete the 10th level of the Challenge Rift. Upon the culmination of this feat you’ll obtain - without any warning or prior buildup - the [Caldesann’s Compassion] Vessel. Despite the unceremonious lack of fanfare, this starts the quest “Legacy of the Horadrim”, which will ultimately lead you to Iben Fahd’s Sanctum.
How to Install and Upgrade Vessels in the Legacy of the Horadrim
After the Challenge Rift where you obtain Caldesann’s Compassion you’ll need to run around and investigate a fountain, after which a ghostly Horadrim ancient will lead you to a statue just north of the Challenge Rift Entrance. Once the chatter subsides, interact with the statue to find the entrance to Iben Fahd’s Sanctum, a dungeon you can clear every day for various rewards, but mostly to earn resources you can use to upgrade various Vessels in the Legacy of the Horadrim.
Enter Iben Fahd’s Sanctum and endure much chatter as you’re introduced to both the aforementioned sanctum and to the “Legacy Shrine”. At the end of this interaction you’ll be forced to interact with the Legacy of the Horadrim and install the Caldesann’s Compassion Vessel you acquired earlier, giving you a minor boost to Armor and Armor Penetration. The tutorial will then lead you to the Sanctum depths, where you’ll need to complete your first run of the Iben Fahd’s Sanctum dungeon.
Enter the “Sanctum Depths” and you’ll find a fairly linear dungeon populated with a variety of undead. As you clear the dungeon you’ll earn Aspirant’s Keys, which randomly drop from enemies you defeat.
At the end of the dungeon you’ll find a room full of chests, one of which you can freely open just for clearing the Sanctum Depths. Subsequent chests can be opened by using Aspirant’s Keys, with each additional chest requiring more Aspirant’s Keys to open. This functionally limits the number of chests you’ll be able to open at the end of each dungeon run less you go out of your way to acquire more Aspirant’s Keys by other means - you can pick up 5x Aspirant’s Key per day by trading with the Hilts Trader.
Opening these chests will reward you with a variety of “Culling Stones”, which come in three flavors - Sapphires, Garnets and Beryls. These can be used to upgrade Vessels installed in the Legacy of the Horadrim, and serves as your primary motivation for clearing the Sanctum Depths dungeon in Iben Fahd’s Sanctum every day. Different Vessels require different Culling Stones, and the more you upgrade Vessels, the more Culling Stones subsequent upgrades will require.
As you find more Vessels, return to the Legacy of the Horadrim and install them, and be sure to run through the Sanctum Dungeon on a daily basis to ensure you’ve got plenty of Culling Stones to expend on upgrading your Vessels.
For pages related to the Legacy of the Horadrim, check out the following: