Grubbis

Grubbis is an elite trogg found in Gnomeregan. He is accompanied by his pet basilisk, Chomper. Grubbis and Chomper spawn near the end of Blastmaster Emi Shortfuse's event.

Adventure Guide
''The radioactive gas that flooded the city was meant to anger the troggs and kill the gnomes, and Thermaplugg's plan was brutally effective. One trogg, however, reacted oddly to the substance: Grubbis grew. And grew. It was a side effect that Sicco had not anticipated, but he's never been one to waste valuable (and dangerous) resources. This giant trogg now patrols the tunnels of Gnomeregan. His loyal basilisk pet, Chomber, helps Grubbis sniff out gas leaks, tasty fungi, and even tastier intruders.''

Combat info
Grubbis does not put up much of a fight. The real challenge is the swarms of troggs that come before and with him. Note: Do not run into the tunnel where the troggs emerge. It collapses after a minute, following chat warnings by Blastmaster Emi Shortfuse.