The Ring of Azar was given to Slade by Trigon, Raven's evil father, in order to protect him while Slade was dealing with the Teen Titans.

The two of them made a deal: Should Trigon destroy the Earth, he would restore Slade's soul into his body. Slade later gave it to Starfire, to protect the Titans from Trigon. However, the ring was destroyed in The End - Part 3 by Starfire's corrupt clone.