Here is the Master of the Five: Dokuryu!

A titanic abomination made its way from the darkest pit of the underworld. This was an unholy beast whose mere presence caused the land to wither as though it was poisoned. It was a creature born of pure dark magic and thus could harness that power to its will. Those who managed to encounter the creature barely lived to tell the tale, and they even gave it a name; the Dokuryu, translated as simply poison dragon
The demon was quick to gather masses of followers to its side, including five wicked acolytes who learned to wield the darkness just as their master.