Ring of Thrór



"Seven for the Dwarf-lords in their halls of stone"

Thráin's Ring is the mightiest one among the seven dwarven rings.

Background
Sauron presented the Rings in Hall of Stone for the Dwarf-Lords. And 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

The mightiest of the Seven was taken from Thráin II, heir of Durin, who had been captured, imprisoned, and tormented by the Necromancer (Sauron in disguise) in TA 2845.

Shortly before the outbreak of the War of the Ring, Sauron's envoy approachedDain 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.

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.