Krumm is one of 2 thugs in Area East of Gnoll Stronghold (at 3370, 2110) trying to cut down an ancient oak tree, in the mistaken belief that they will find treasure beneath it. The Dryad of the Cloud Peaks asks you to stop them from doing so, beginning the side quest Dryad of the Cloud Peaks.

— Krumm

although they seem dim of wit, they still could do much damage

— Dryad of Cloudpeaks

In BG:EE, Krumm's club is a Club +1.