This song is called "the dawn" and comes from the Finnish band Dreamtale. This song is directly adapted from the classic episode in the American blockbuster "The Rock".
It was later called Undead Overture and became well-known because some Warcraft enthusiasts edited the opening animation of Warcraft 3 and made it into a MV, and this song was used as the soundtrack. The song "the dawn" itself has nothing to do with Warcraft.
The author of the "Overture of the Undead" MV "Flying to the Clouds" was originally a loyal player of the undead in the Warcraft 3 game. This was also the original intention of naming the MV "Overture of the Undead", but the earliest MV for the "Overture of the Undead" was produced after The purpose is to commemorate the undead race in Warcraft 3. In the historical background of Warcraft, it is the undead Scourge and its leader, the death knight Arthas. With the rise and popularity of World of Warcraft in China, a large number of undead races (ie. Forsaken) players regard it as a symbolic song of the race, so that the Overture of the Undead MV has become the representative song of World of Warcraft in the hearts of World of Warcraft players, which has also led many people to mistakenly call the Chinese name of the song The Dawn Overture of the Undead.