The fourth phase of WoW Classic anniversary servers will be launched on May 1.The update includes the return of Zul'Gurub, the Stranglethorn Fishing Extravaganza, and the addition of tier 0.5 dungeon set pieces.Players have been instructed to return to Zul'Gurub multiple times, making this the fourth call to return.WoW Classic Anniversary servers offer the opportunity to relive classic WoW experiences.