Sauron

Sauron is the evil Dark Lord who is the main antagonist of the Lord of the Rings series. Sauron was originally a servant of the fallen valar Morgoth. In the second age Sauron created the rings of power: nine for men, seven for the dwarves and three for the elves. Then, unknown to the bearers of these rings, he created another ring to rule them all. He used this ring to control Middle-earth.

An alliance of men and elves rose to challenge Sauron at the base of Mount Doom. Amidst the battle, Isildur's father was slain by Sauron himself, and Isildur picked up his father's sword and severed off his fingers. The One Ring was removed from Sauron's body and his body vaporized, but he was however not completely vanquished since Isildur would not destroy the One Ring when given the chance. Sauron later attempts to regain his power and his ring, but he is thwarted by the efforts of Frodo Baggins and the Fellowship of the Ring who finally manage to destroy the ring by throwing it into the fires of Mount Doom.