Eon is the main antagonist of book one and secondary antagonist in book four (while under the control of Skall).
Eon, once a defender of the balance of light and dark, held back the darkness from spilling into the light. However, the darkness became to much for him to handle and corrupted him, making him lust for power. He decided to shroud the world in darkness to feed his ever-growing thirst, but as time went by, he found that he could not do it alone. After he came to this realisation, he adopted a young man, Malaci Efrain, as his apprentice, in 1670.