Greedy and cruel with dwarven hoard,
which in turn caused death by the sword.
One of the greats in the grey of the Third,
not much more of him has ever been heard.
Scatha
Scatha the Worm was a mighty Long-worm of the Grey Mountains and one of the greatest Dragons to infest that range of the north.
(Thanks to Jordi Chalmeta)
Tolkien Gateway: Scatha