There are three caves of time, and two belong to five people, namely, saving Sal and 18 wave. You can organize people to worship these two copies at any time, and then you can transport them from the sand to the cave of time, saving a lot of running time.
There is also a defensive barrier with a hat! Haishan needs a team copy of 25 people, and there is a ring after this worship, but in the early stage, you have to do the task of eternal water bottle, that is, pick it up in the cave of time, and then kill Prince Storm and Sister Viper!
Story background (Blackstone disaster)
After the invasion of natural disasters, the continent of Azeroth was devastated, and the Fiwood forest became a dead silence. The rotting bodies of the Tirisfa rangers who had already died but stood up again were filled with thick fog all day, and the desert of Cyrus was undercurrent. The kingdom of Lordaeron was destroyed, and Illidan betrayed the night elves and was exiled to Outland.
Former Prince Arthas finally ascended the frozen throne and became Northrend's new Lich King. The war seems to have subsided temporarily, because the fragile agreement reached by the warring tribes and alliances seems to have been gradually forgotten.