Skull the Slayer (1975) #4

The scientists and Skull take a beating in the Tower of Time, an alien construct filled with dimensional wormholes. But when the three scientists seemingly perish at the hands of Slitherouge, guardian of the Tower, it’s up to Skull to save the mission! Skull the Slayer thrown into the Arthurian court of Camelot! Guest-starring Merlin and the Black Knight.