Gostir

Gostir was a dragon who lived in a cave in the Everfree Forest.

History
Being an adult dragon, Gostir was likely extremely old. He had a respectable hoard in his cave, which took a liking to. When Gostir found Spike, he chased him out of his cave until the young dragon was saved by Owlowiscious and.

Behind the scenes
Gostir means "dread glance" in, from gost (dread, terror) and thîr ("look, face, expression, countenance")