Slayers: Ancient Stirrings
Dark Lord of the Mazoku, he fought the Flare Dragon, Ceiphied ages ago in the attempt to destroy the world. He was beaten, but not destroyed, and broken into 7 pieces that were sealed throughout the world.
The first of his segments awakened 1,000 years ago, sparking the Kōma War and was dealt with by the Water Dragon King.
The second was awakened 2 years ago and destroyed by the Sorcery Genius, Lina Inverse.
The locations of the other 5 dormant segments are as yet unknown.