Conan (1970) #4
"The Tower of the Elephant" is written by Roy Thomas and drawn by Barry Smith and Sal Buscema. Over the course of his life, Conan the Barbarian would be many things: a pirate, a mercenary, even a king. But in his young days, Conan was a thief and found no greater pleasure than relieving a fat, rich priest of his coin purse. So when he overhears a tale of the Tower of Elephant and the great treasures housed within, Conan pays no heed to the warnings about the tower's supernatural guardians.
Befriending a Nemedian thief named Taurus, Conan assails the tower after dispatching the mute lions that guarded its lowest levels. Crawling up the bejeweled surface of the structure, he enters the uppermost chamber in time to see Taurus struck down by a monstrous spider. Beyond the spider, an even stranger sight: a green-skinned man with the head of an elephant. From this otherworldly creature named Yag-Kosha, Conan hears a tale of pain and enslavement and upon hearing it, he willingly becomes the elephant-man's instrument of divine vengeance!