Kehl was a werebbubb, and a member of the band of mercenaries known as "Koshchey's Men", in the short story "Droga, z której się nie wraca" ("A Road with No Return") and the graphic novel based on that story, Droga bez powrotu.

After realising their differing intentions, Kehl turned upon his employer, the sorcerer Fregenal, and left along with seventeen other dissenters from Koshchey's Men. Kehl later returned and helped Visenna and Korin kill the koshchey the former druid had summoned. However, Visenna was forced to kill him in an act of mercy due to the mortal injuries he sustained during the battle.