Published Aug 1977 by Marvel.
"When Walks The Warlord!" Story by Bill Mantlo and Keith Giffen. Art by Keith Giffen and Don Perlin. In an effort to fulfill his oath to the Sub-Mariner, Doctor Doom journeys beneath the ocean to revive the comatose citizens of Atlantis. However, before the Latverian monarch can save the people of Atlantis, Namor must defeat the interfering Warlord Krang!