He's hardly strong enough to be a real threat; even some of his mortal companions could probably best this thief, in a straight up fight, though he's well into epic levels. He'll be a bit surprised when he's asked in, and, while he'll accept, he'll also be quite suspicious, and rather annoyed at being escorted, closely, clearly looking for a chance to slip away. He'll respond candidly to questions, though, and reveal that there's a bounty posted in Union, requesting any unusual or exotic items from the 'lair' of Draiss Arcaniss; in fact, the bounty is measured at up to ten million gold pieces, for the most valuable items.