Kehl was a werebbubb member of the band of mercenaries known as "Koshchey's Men" in the years preceding the birth of Geralt of Rivia.

After realising their differing intentions, Kehl and seventeen other members of the band turned upon their leader, the druid Fregenal, tied him up in a cave and left. 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.