In some myths, such as The Descent of Inana, seven Anunnaki serve as netherworld judges, condemning Inana to death after her attempt to overthrow her sister Ereshkigal.
In this story, she descends to the realm of her sister, Ereshkigal, the goddess of the Underworld, to attend a funeral and is trapped there.
Ereshkigal - Goddess of the underworld and death