Conan infiltrates the Temple of Set,
a cult that indulges in a cannibalistic orgies and mind control. (Sound familiar)
Doom, the leader, magically can transformed into a large snake. (Sound familiar)
In the end Conan confronts Doom and uses his father's Sword to kill Doom. (Sound familiar)
After the disillusioned cultists disperse,
Conan burns the whole corrupt temple to the ground. (Sound familiar)