Ereshkigal vs Sun-goddess of the Earth

Queen of the Underworld and sister of Inanna. Ereshkigal rules the land of no return with absolute authority, from which no one, god or mortal, escapes unchanged.

When the cosmos was divided among the gods, Ereshkigal received the underworld as her domain. Abducted to the underworld in her youth (or given it as a dowry), she became its eternal queen. She was wed to Gugalanna, the Bull of Heaven, and later to the war god Nergal.

Ereshkigal is the absolute ruler of the underworld (Kur or Irkalla), a vast realm beneath the earth where the dead dwell in eternal twilight. Unlike later concepts of hell, the Mesopotamian underworld was not a place of punishment but simply the inevitable destination of all mortals. Ereshkigal reigns there with cold, implacable authority.

The Hittite ruler of the underworld, the 'Dark Earth', identified with the Hurrian Allani and the Mesopotamian Ereškigal: the sun as it travels beneath the earth at night.

The Hittites imagined a sun deity of the underworld, the Sun-goddess of the Earth, who ruled the "Dark Earth" (dankui tekan) beneath the land of the living. The idea seems to be that the sun passes through the underworld at night; the goddess who governs that realm is its solar counterpart. In Hurrian texts she corresponds to Allani, the lady of the underworld, and god-lists equate her with the Mesopotamian Ereškigal.