The Last Inundation is an Amaian cultural ritual performed at the end of life. The Amaians have deep ties to the ocean depths, having evolved from aquatic creatures, and developed a elemental god, K'si out of their reverence for it. The Last Inundation expects all nearing death, whether elderly or infirm, to return to their homeworld of Delphi and sail out to the deepest reaches of the ocean where they say the waters are most profound. Once there, a grand ceremony is held commemorating how Amaians are born from the waters and thus ultimately must return to them. The individual then dives down into the depths and drowns, once more becoming part of the great ocean.
This process is consider the honorable way for any Amaian to die, all Amaians are preoccupied with insuring this final rite and it is a shameful act not to take part in it. It has the secondary benefit of lightening the burden of Amaian society in the care of the elderly and infirm.