When Milius was appointed as director, he took over the task of writing the screenplay. Although listed as a co-writer, Stone said Milius did not incorporate any of his suggestions into the final story. Milius discarded the latter half of Stone's story. He retained several scenes from the first half, such as Conan's crucifixion ordeal, which was taken straight out of "A Witch Shall be Born", and the climbing of the Tower of Serpents, which was derived from "The Tower of the Elephant". One of Milius's original changes was to extend Stone's brief exposition of Conan's youth—the raid on the Cimmerian village—into his teens with the barbarian's enslavement at the Wheel of Pain and training as a gladiator. Milius also added ideas gleaned from other films. The Japanese supernatural tale of "Hoichi the Earless", as portrayed in Masaki Kobayashi's Kwaidan (1965), inspired the painting of symbols on Conan's body and the swarm of ghosts during the barbarian's resurrection, and Akira Kurosawa's Seven Samurai (1954) influenced Milius's vision of Conan's final battle against Doom's men. Milius also included scenes from post-Howard stories about Conan; the barbarian's discovery of a tomb during his initial wanderings and acquisition of a sword within were based on de Camp and Carter's "The Thing in the Crypt". According to Derek Elley, Variety's resident film critic, Milius's script, with its original ideas and references to the pulp stories, was faithful to Howard's ideals of Conan.
