Does anyone else remeber when the maiden of vitality blue screened in BFA and started talking about different "Uld" facilities. One of them being Ulduras and how it should not be approached.
Also doesn't Ulduras sound similar to Antorus? What if Ulduras is the Facility that is housing the World Soul in Azeroth similar to Antorus and Argus, and is located in the Dragon Isles, explaining why the Dragon Isles seem to be hidden away?