Early lifeLambert was born to an alcoholic father who regularly beat both him and his mother and each night, they prayed for the man's death. They nearly got their wish when, one evening, his father lost his way returning from the tavern and stumbled into a nekker nest. However Vesemir was passing nearby and saved his life, claiming the Law of Surprise as his reward. This unexpected reward turned out to be Lambert, who was then taken to Kaer Morhen and began training as a witcher—a fate he would later resent, having had no say in the matter.[1]

His final test before becoming a fully fledged witcher was the Trial of the Medallion, where Lambert and other young recruits had to work together to activate their medallions. The group sailed across the pond, which ended in one recruit drowning. The remaining recruits navigated through the caverns, where they encountered a cyclops named Old Speartip. Unfortunately, the cyclops slew several of the young boys, including Voltehre. After climbing Troll's Head, they encountered a trio of rock trolls, whom they managed to avoid, before reaching the Circle of Elements. There, Lambert retrieved his medallion and proved himself worthy to set out on The Path.