Shaman of the Vise'ad handles religious and ceremonial matters for the tribe occasionally with his brother Heleste. A few months ago when the tribe was 'out beyond the eastern jungles' he was the first to begin having visions of a 'grand, 4-armed lord' who called to Guthber in his dreams to come to free him from his 'unlawful imprisonment'. Guthber quickly led the tribe West, arriving at the Truthwatcher Dome about 2 weeks ago.
Wanting leadership of the tribe for himself rather than the difficult 'elf obsessed' Buttwaz he convinced her to walk into the unstable rift they found, not expecting half the tribe to immediately follow.
Since then Guthber and the others (including the Human Druid Zaharel, recently defeated) have been trying to find a way to properly stabilize the rift to free their lord trapped inside (and maybe see of the rest of the tribe's alive, that too). Many of the kobolds have begun to mutate wildly, loosing track of who and what they were before, but Guthber seems unperturbed, at least according to Heleste who said Guthber 'threw him in the river' when he tried to get him to stop.
Lead the surviving Kobolds out of the dome, saying 'their master's freedom was almost at hand'. Was killed by the PCs with some liberal use of the polymorph spell. Notably, Guthber's right hand came detached on its own, then started moving and changing shape? See Handy