Underealm

An ancient and little used name for the Afterlife. It is the realm that Tartarus created beneath Gaia's world. Underealm appears as a twin to Gaia's earth, but it lacks the signs of civilization and dwellings. Souls of the recently deceased pass through Lethe as they enter Underealm, (Lethe, is also often used by humankind to describe the afterlife). Underealm became the home for the souls of the dead, who wander lost, while slowly being pulled by an unseen force towards the realm of Styx.