Thulsa Doom
Background
Thulsa Doom is a Stygian wizard. He is rumored to be a thousand years old. His magical powers include the ability to hypnotize a person, transform into a giant snake and change snakes into target seeking arrows. Thulsa Doom also searched for the Riddle of Steel and decided human flesh is stronger than steel. He is able to use strength to lead raiders and charisma to lead his cult.
During the events of Conan the Barbarian (1982) played by James Earl Jones
Thulsa Doom leads his raiders against Conan's village. He uses hypnotism to make Conan's Mother drop her sword and then cuts her head off. He then leaves with the other raiders after setting Conan's village on fire. After Conan is caught trying to sneak into the snake cult temple disguised as a priest, he is beaten and then brought in front of Thulsa Doom. Thulsa Doom interrogates Conan and asks him where the Eye of the Serpent is. Conan tells Thulsa Dooom he killed his family and people and Thulsa Doom realizes he must be talking about his time when he was a youth. He tells Conan his version of the answer to the riddle of steel. He says flesh is stronger for what is steel compared to the hand that wields it. He then condemns Conan to the Tree of Woe. During Conan, Subotai and Valeria's attack on the pleasure garden to capture the Princess, Thulsa Doom senses danger and turns into a snake and escapes. Thorgrim and Rexor arrive but both are beaten by Conan who escapes with the Princess. Thulsa Doom returns as a man and transforms a snake into an arrow and fires it from a bow, hitting Valeria in the side with it. Thulsa Doom and his warriors attack the ruins Conan and Subotai are at. A lopsided battle happens. Thorgrim is tricked into hitting what he believes to be Conan's helmet but is only a spring loaded trap that impales him with a large stake. Conan distracted by the dying Throgrim is surprised by a charging Rexor. Rexor gets the upper hand and is about to kill Conan when Valeria appears as a Valkyrie and temporarily blinds Rexor. Conan then kills Rexor breaking his father's sword in the process as Rexor was using his fathers sword. Thulsa Doom retreats but fires a snake arrow at the Princess which is blocked by a shield held by Subotai. Conan picks up his broken father's sword. Later that night, Thulsa Doom is standing on the balcony of his temple giving a speech about cleansing the earth when Conan appears behind him with his father's sword and the princess. Thulsa Doom tries to hypnotize Conan but it fails and Conan hacks Thulsa Doom's head off and then throws his head at his followers down below.