Blizzard
As in original World of Warcraft, the Dragons of Nightmare have some randomness to their comings and goings.
So that players don’t have to wonder and wait, we’re going to trigger the four dragons to spawn for the first time on all realms at 3:00 p.m. PDT (6:00 p.m. EDT) tomorrow, Thursday, April 16.
Thereafter, they’ll respawn according to their own designs.