Considering Mumpers comment on players not effecting the spawns, I think the link to rare spawns seems like the most likely "event" for spawning them.Quintessence wrote:Saw this comment on Wowhead and decided to look into it.
Comparing both Dakender's map screenshots of locations where the Unborn Val'kyr was found, and spawn points for rares in Northrend, I've found two possible matches so far.
The one in Icecrown is near High Thane Jorfus' spawn area, and the one in Scholazar is near Loque'nahak's.
Even if they are not specifically related to rare spawns, perhaps they share the same spawn point as them. Maybe on the same/similar timer too? Rotation between rare spawn and pet?
It even fits well with the journal description - they are here to kill the rares and become true Val'kyr! (That would be the cutest battle in WoW history lol)