Let Slip The Kobolds Of War

So while the adventuring trio of Ebelnard, Attar and Henklestout son of Thugwart are dealing with the grim portents of the wandering elf, Ninaran, a looming threat only whispered on the lips of the villagers of Winterhaven is stirring for a fight.  A rowdy band of Kobolds lead by a menacing Goblin named Irontooth are itching for a fight! But who is their "Dark Master" and why is he so interested in the destruction of such an obscure hamlet...