Hades The Unseen One

Hades was the eldest son of the Titans, Cronus and Rhea. He was born in darkness and kept in darkness when his father, Cronus, swallowed him. After a ten-year war between the Titans and the Olympians, Hades found himself again unseen and in darkness.
He became the Keeper of Souls. Lord of the Dead. The Unseen One. He was a God to be feared and revered. Hades was content in ruling the Underworld until he wanted more.

A prequel to Hades and Persephone.