The Sha of Anger in World of Warcraft typically spawns every 15 minutes, with a spawn window usually between 12 to 20 minutes. This timer is similar to other world bosses like Galleon. However, the spawn can feel irregular or confusing due to layering/phasing mechanics where the boss may appear on different "layers" or instances of the zone, causing delays or difficulty in seeing the spawn in a particular layer. The respawn timer itself is somewhat random between 10 and 20 minutes, varying from kill to kill. Additionally, it has multiple spawn points spread across these layers.