Gollum
Gollum is a fictional character from J. R. R. Tolkien's legendarium. He was introduced in the 1937 fantasy novel "The Hobbit", and became an important character in its sequel, "The Lord of the Rings". Gollum was a Stoor Hobbit of the River-folk, who lived near the Gladden Fields. Originally known as Sméagol, he was corrupted by the One Ring and later named Gollum after his habit of making "a horrible swallowing noise in his throat".
The Hobbit: An Unexpected Journey
The company journeys into the Misty Mountains, where they find themselves amid a colossal battle between Stone Giants. They take refuge in a cave and are captured by Goblins, who take them to their leader, the Great Goblin. Bilbo becomes separated from the Dwarves and falls into a crevice where he encounters Gollum, who unknowingly drops a golden ring. Pocketing the ring, Bilbo finds himself confronted by Gollum. They play a riddle game, wagering that Bilbo will be shown the way out if he wins or eaten by Gollum if he loses. Bilbo eventually wins by asking Gollum what he has in his pocket. Noticing his ring is lost, Gollum realizes that Bilbo possesses it and chases him. Bilbo discovers that the ring grants him invisibility, but when he has a chance to kill Gollum, Bilbo spares his life out of pity and escapes while Gollum shouts his hatred towards the hobbit Baggins.