Xûr, Agent of the Nine
Xûr, Agent of the Nine is a vendor who sells extremely rare goods in exchange for Strange Coins and only appears on weekends from Friday to Sunday. In Destiny, Xûr appears randomly at one of six locations in the Tower or one location in the Vestian Outpost. In Destiny 2, Xûr's location varies every week. He can appear at the Imperial Barge on Nessus, the Hangar in the New Tower, Io, and Titan.
Xûr's coming and going depends on the planetary alignments, as he hails from the Jovians, a place beyond even The Reef that the Guardians have yet to adequately explore. He is subservient to the Nine, enigmatic rulers of the Jovians, the section of the Solar System past the asteroid belt.
Xûr claims that his will is not his own, and he is in complete servitude to The Nine. It is important to note that he is not one of them.
Xûr first appeared in the Tower after the end of the Great Ahamkara Hunt. Cryptarch Lavinia Garcia Umr Tawil speculated that the Nine had previously made use of the Ahamkara for their paracausal abilities, and had sent Xûr to interact with the Guardians for similar reasons.
Xûr once was confronted by the Guardian Orin, who was sent by Mara Sov to investigate the Nine's role in the disappearance of Sjur Eido. Xûr asks Orin to "forgive them", as she crushes his windpipe and interrogates him. After being freed from Orin's grasp, he reaches into his robes to reveal a silver jar—misinterpreting Xûr's movements as a sign of hostility, Orin struck the Agent in the chest with her war hammer, sending him flying and breaking his spine. Though Xûr survived, he acquired a permanent hunched posture due to his injury.
Wares in Destiny
Year One Inventory
Every week, the available stock is chosen at random, but occasionally he will sell one item more than once every few weeks.
Year Two Inventory
Every week, the available stock is chosen at random. Note that Xûr will not sell both an Exotic weapon and a Legacy Engram during the same visit, only one or the other.
Year Three Inventory
Every week, the available stock is chosen at random, but some items may accidentally be featured more than once within a certain timespan. Note that Xûr will not sell both an Exotic weapon and a Legacy Engram during the same visit, only one or the other. Legacy Engrams only contain Year 1 weapons or armor, but if a player receives a weapon that they don't have in Year 3, that same weapon will become available in its current iteration in the Exotic kiosks in the Tower.
Wares in Destiny 2
In Destiny 2, Xûr appears either in a predefined spot within the Destination chosen as that week's Flashpoint, or else the Tower if a DLC Destination is selected. Instead of Strange Coins, he accepts Legendary Shards. Each week, his available stock of Exotics is randomized; he offers one random armor piece for each class, a random weapon, a special 'fated' or 'isochronal' engram that is guaranteed to decrypt into an as-yet undiscovered non-quest armor or weapon, and assorted other items.
List of appearances