Astarta

Astarte is the goddess of the underworld who wants to conquer the whole of Alagaësia.

Biography
Many years ago (before humans appeared) Astarte ruled on another continent known as Altera. When the gods created Alageisia, Astarte wanted to destroy her, as punishment the gods made her mortal. Astarte hatched a plan for revenge and taught a man named Galbatorix in everything she knew. However, her student became so strong that he soon forced Astarte to submit to himself.

Astarte fled from Alagaësia to her native continent. Many years later, when Galbatorix was dead, she figured out a way to regain her immortality. To do this, she needed to kill someone else.

Astarte killed a man named Beorn, and her strength returned.

Eragon found a way to defeat Astarte and, with the help of the Eldunari dragons killed by Galbatorix, imprisoned her in the afterlife.