- "Seven for the Dwarf-lords in their halls of stone."
- —J.R.R. Tolkien
Thráin's ring was the mightiest of the seven dwarven rings.
When Sauron presented the Rings in Hall of Stone for the Dwarf-Lords, He gave the mightiest one to Lord of Durin's Folk, Thráin II. The Ring increased his life span, but he was controlled and corrupted by Sauron.
Shortly before the outbreak of the War of the Ring, Sauron's envoy approached Dáin II Ironfoot in Erebor and offered to return the three surviving Rings to the dwarves, if they would help find the One Ring. Dain refused, knowing from the dwarves' long experience that Sauron was untrustworthy.
Portrayal in adaptationsEdit
The Hobbit film trilogyEdit
In the extended edition of The Hobbit: An Unexpected Journey, Gandalf expresses concern about the fate of Thrain's ring, identifying it as the last ring of the Seven not said to be in Sauron's power when he fell, with four destroyed and two taken by Sauron. In the extended edition of The Hobbit: The Desolation of Smaug, when Gandalf discovers Thrain in Dol Guldur, a flashback confirms that Thrain possessed one of the Seven during the attempt to retake Moria, with Azog having cut off the top of Thrain's left index finger to take his ring.