Gollum (Sméagol)

Originally a member of the Stoor branch of Hobbits living near the Gladden Fields, Sméagol obtained the One Ring by murdering his kinsman Déagol. Possession of the Ring extended his life far beyond natural limits and over centuries corrupted his body and mind. He withdrew into an island in an underground lake at the roots of the Misty Mountains, surviving on cavefish and scavenged food; over time his Hobbit form was twisted into the creature later called Gollum. The character is presented in the sources as a single, individuated former Hobbit whose altered condition results from prolonged exposure to the Ring rather than as a separate folkloric species.

Sources describe Gollum as a small, slimy creature, pallid and physically reduced from his Hobbit origins after centuries of corruption by the Ring. He lives on an island in an underground lake beneath the Misty Mountains; his eyes have adapted to dark conditions and are described as 'lamp-like', shining with a sickly pale light. He survives by eating cavefish and, at times, small goblins; overall his body and manner reflect long isolation and physical degeneration from Stoor Hobbit ancestry.

Gollum displays unnaturally prolonged life and obsessive attachment to the Ring—effects explicitly attributed to the One Ring in the sources. He demonstrates exceptional stealth, cunning, and survival skills in subterranean environments (fishing, scavenging, stalking), and a facility for riddling speech (as in his riddle game with Bilbo). Psychologically he exhibits a divided self—Sméagol and Gollum—as a salient behavioral pattern. Beyond the Ring's consequences (extended lifespan, psychological domination), the sources do not ascribe independent magical powers to him; his dangerousness is a function of his cunning, obsession, and physical persistence rather than innate supernatural abilities.