Sauron was created by Ea originally as one of the many Maiar and Ainu Spirits. Sauron managed to remain good and uncorrupt, resisting the corruption that was instilled in many of the Ainu through Morgoth’s discord in the creation of Arda. After travelling to Arda, Sauron aligned himself with Aule the smith, where he learned and mastered the craft. Though Sauron sought to do good, he saw in Morgoth the will and power that would help him achieve greater things quicker than if he had pursued them himself. Once his allegiance was made to Morgoth, he fell deeper into his corruption and eventually became a lieutenant and was lord of the Werewolves and Vampires, directing the war against the elves. Sauron was later defeated by Luthien and Huan the wolf-hound and went into hiding for most of the First age until the defeat of Morgoth. After lying dormant and hidden for 500yrs, Sauron began revealing himself as Annatar “The Lord of Gifts” where he deceived the elves to forge the rings of power, while Sauron forged in secret the ring of power. Through the second age, Sauron gained power and called himself “Lord of the Earth”. After losing his body in a failed attempt to destroy valinor, Sauron came forth in the Battle of Dagorlad but was defeated by Isildur and still lived through the power of the ring. Though in ethereal form, Sauron sought to form his armies and take physical form again but was later destroyed after Frodo Baggins cast the ring into mount doom (Y’all know the damn story).