The last years of ancient Atlantis sought direction of the giant glass-like dome over the capital city of the empire (also called Atlantis). Its last rulers were King Kamuu and his wife Queen Zartra, a native of the Lemurian Isles, which had been conquered by the non-human race of Deviants. The Atlantean empire had been in a state of decline after Kull's era. The empire was reeling with civil war in all of its provinces and the fighting kept encroaching closer and closer to the capital city. Finally barbarians from the Lemurian Isles attacked Atlantis on behalf of the Deviant Empire, and to rout their forces King Kamuu opened the magma pits, which were the city's means of heating. The Lemurian invaders were destroyed by the molten lava, but due to unprecedented volcanic pressure beneath the city, the magma release triggered a seismological cataclysm. First the capital city, and then the entire continent of Atlantis itself was racked by earthquakes and volcanic eruptions. At the same time, the Deviants themselves launched the attack on the surviving Second Host of the alien Celestials. The Celestials retaliated by causing a nuclear cataclysm, which sank Lemuria and created shockwaves that shook the entire world. As a result of the local geological convulsions and the after effects of the Lemurian cataclysm, the entire continent of Atlantis fragmented and vanished beneath the Atlantic Ocean in about a week.

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