The One Ring was forged in secret by the Dark Lord Sauron during the Second Age within the fires of Mount Doom. His intent was to create a master tool to control the bearers of the other Rings of Power, concentrating his malice and a great portion of his own soul into the gold band. It is inscribed with Elven-runes in the Black Speech: "One Ring to rule them all, One Ring to find them, One Ring to bring them all and in the darkness bind them." The Ring possesses a corruptive will of its own, seeking always to return to its creator. It grants its bearer invisibility by shifting them into the wraith-world, but at the cost of "thinning" their life force and eventually enslaving them to the shadow. After being lost for centuries in the Great River Anduin, it was found by Gollum, then Bilbo Baggins, before passing to Frodo Baggins to be cast back into the fire from whence it came.