It is based on the mythical island of Atlantis first mentioned in Plato's initial dialogue the Timaeus, written c. 360 BC.
When barbarians sent by the Deviant Lemuria empire attacked Atlantis, King Kamuu opened the magma-pits which were the city's means of heating.
[4] Other ancient Atlanteans survived the sinking of the continent by various methods, including Dakimh the Enchanter, Varnae, and Stygyro.
The Serpent Crown had been crafted by ancient Atlantean alchemists as a vessel empowered by the demonic Elder God Set.
Through their leader Naga's exposure and extensive use of the ancient mystical device, they become more serpent-like in appearance than their Atlantean cousins.
[volume & issue needed] The city of Atlantis is damaged when the super-villain Nitro explodes, taking with him Namor's traitorous son, Kamar.
As the Orichalcum proved to be too powerful to be the Atlantean's superconductor, it created a vortex that sunk Atlantis beneath the ocean.