This section concerns content exclusive to Legion.
It is unknown when Locus-Walker first met Alleria, but when he did he taught her about the nature of the Void. At this time Alleria assumed he was the only one of his kind to tangle with the Void.
While investigating why the Void was corrupting the Krokul of Mac'Aree on Argus, Alleria and an adventurer from Azeroth encountered Locus-Walker. He explained that he had come to Argus to investigate what the Shadowguard, a group of ethereals who had tragically succumbed to the Void, were doing there. The Shadowguard, in turn, wanted to capture Locus-Walker before he could disrupt their efforts of making Argus fall to darkness. After showing Alleria and the adventurer what the Shadowguard was up to, Locus-Walker confronted Alleria about her husband and what he thought of her use of shadow magic, asking how she could use it when the Light shone so brightly beside her. Alleria countered that without the Light, there is no Shadow. Locus-Walker had hoped to find more ethereals among the Shadowguard who possessed the necessary strength of mind to resist the Void, and was disappointed to find such an utter lack of resistance.
After taking care of the ethereals at the Shadowguard Incursion, Locus-Walker decided to allow Alleria another opportunity to pursue her destiny. After slaying the void revenant , Locus-Walker retrieved its heart and gave it to Alleria, who consumed it. After telling Alleria that as long as her mind remained her own she could control the Void's power and that perhaps someday he would tell Alleria how he came to control it by himself, Locus-Walker took his leave.
Locus-Walker appeared again when the Army of the Light sought the Crest of Knowledge from the Seat of the Triumvirate. After died, Locus-Walker took his staff. During the battle with he prompted Alleria to use the power of the Void rifts the dark naaru was opening, culminating in her absorbing L'ura's essence and transforming into a Void state that she could turn off and on at will. After saying they needed to test the limits of her newfound power, Alleria and Locus-Walker left the Seat. His whereabouts afterward are unknown.
- Locus-Walker says: It is rare that a naaru falls into Void this way. The few cases I know of have occurred when mortals were involved. What fascinating implications... (when in front of in the Seat of the Triumvirate)
- calls Locus-Walker a "disreputable individual" who sought him out as a financier for a project that sounded profitable, and Locus-Walker has never repaid Vashreen's investment.
- When he is clicked on multiple times, Locus-Walker jokes that his real name is an ancient word of power, and speaking it aloud would rip open a thousand Void portals and tear reality asunder, and that if he whispered it to the player their mind would fall to madness.
- Locus-Walker may be a nexus-stalker, given his use of the Void and the deep purple color of the energy beneath his wrappings.
- Patch 7.3.0 (2017-08-29): Added.