The Black Rings

Originally nine Artifacts that according to legend keep the Anti-Sun  away from the Sun. A Ring was given to each of the old races by the gods. The Rings were made from ebony and were meant to be fragile. The were to be the old races' guarantee that they could destroy the Sun if they did not take to it after trying for a thousand years. All they had to do was to break a Ring, and the Anti-sun would be drawn into the Sun annihilating it. The nine Rings each have a story, but they are all very similar. Each were stolen by men from one the old races, sometimes with the aid of the elves. Then the Rings were stored safely for a long time, but at some point a man tried to use the power of a given Ring, were seduced by it, and the Ring was lost. This is more or less the story of all the Rings, but in the Ring Saga, one Ring was destroyed without any consequences for the Sun. 
The Nine Rings:
1. The Ring of Grumgar (orcs). It has great priestly powers involving mass sacrifice. Believed to be in the Caverns of Twilight.
2. The Ring of Kotharl (trolls). Perhaps regeneration, strength, troll mass charm. Whereabouts unknown, but was rumored to have been worn by Nefalian in the Troll Wars. Nefalian, one of the trollkin leaders, was killed at Kangrisorn in 1110.
3. The Ring of Scalagrid (dragons) also called Ring of Fafnir.  Whereabouts unknown.
4. The Ring of Sidhe Daoine (sidhe). Believed to be held by the elves.
5. The Black Ring (sea serpents) was once called the Ring of Peist or the Ring of Kraken. After it came into Ogonjok's hands, it was known merely as the Black Ring. Destroyed.
6. The Ring of Yithid (snakes) also called the Serpentine Ring or the Writhing Ring. Though identical to the others off the finger, it is rumored to appear moving when worn.
7. The Ring of Fane (great apes) or the Ring of Madnes. Able to make crowds go insane. Now in the Caverns of Twilights.
8. The Ring of Fomorg (giants), also known as the Ring of Orchi or the Ring of the Titans. Gives the wearer great strength (and uncontrollable temper). Whereabouts unknown.
9. The Ring of Arachne (spiders), also known as the Ring of Bedahl or the Ring of the Weaver. Has powers of intelligence and mind reading. Whereabouts unknown.