How did Gourdain die in the classic plot?

In the tomb of Sargeras, the devil tore him to pieces and died.

Sargeras lied to Goolden that the tomb of Sargeras had the eye of the artifact Sargeras, and Goolden tried to gain mysterious power from the tomb of Sargeras alone. In the process of searching for the ancient tomb, he inadvertently released the demons trapped here and was torn to pieces by these demons and died. It opens the door to Azeroth for the Burning Legion.

Goolden's skull was brought back to Delano by a follower of Goolden. Then Gourdain's skull was swallowed by Illidan, who gained the power of darkness and all his memories.

Extended data:

Gourdain is one of the important characters in the Warcraft series produced by Blizzard Entertainment.

In Draenor, the hometown of orcs, Gourdain was abandoned by his people when he was young. But he was obsessed with power and secretly reached an agreement with a terrible dark force. This army, called the Burning Legion, is a destructive demon army in the universe. Gourdain drank the blood of the devil, which completely distorted the fate of the orcs, and his own face became ugly and terrible because of the erosion of the demon energy.

With the help of several confidants, he formed the notorious Shadow Council and tried to corrupt the orc clan of Delano, making them also the lackeys of the Burning Legion. But his plan failed, and a stranger from another time and space exposed his plot, thus saving the steel tribe from the erosion of the devil's power. Gourdain was branded a traitor, became a prisoner, and was forced to help the orcs open the dark door.

Reference: Baidu Encyclopedia -Gourdain