Kryll was a goblin who served during the time between the Second and Third Wars. His voice held tones of mischief and madness, his skin was emerald green, and his grin was madcap, with long and very sharp teeth, and an almost forked blood-red tongue. His eyes were narrow and yellow with no visible pupils, and his hair was dull brown ridge of fur that rose up from behind his neck and finished as a wild crest above his squat forehead. Although he was wiry and narrow, his body was also muscular.
Kryll was a skilled alchemist and engineer, and giggled a lot, especially when foul work was afoot. His two chief passions were experimentation and mayhem, and whenever possible he combined the two.
Near the end of his life span, Kryll announced his goal to enslave Deathwing using the black dragon scale in the communication crystal given to by Deathwing. Before his plan could fall into place though, he was annihilated by the golem guarding the Demon Soul.
Despite making a wish in the Dalaran fountain, has not yet exploded.