Severin next appears in "Welcome to the Team", after the ancient demon Illyria recruits Buffy to her council of warriors who intend to stop him. Severin reveals his actions were intended to draw Illyria out so he could absorb her time travel abilities and use them to save his girlfriend. He defeats Eldre Koh and Buffy and drains Illyria of her powers leaving her alive in the appearance of Winifred Burkle. Severin and Simone approach Xander to steal the "Vampyr" book from Buffy, with the promise that going back in time will also save the life of Xander's girlfriend Dawn Summers who is currently dying without magic in the world. In "The Core" Xander supplies them with the information they need to enter the Deeper Well. Severin begins absorbing power from all the entombed Old Ones inside and prepares to turn back time. However, the power proves too much for him to control; he cannot reverse time and will soon be killed when he explodes with the energy. Illyria draws from her experiences with Wesley Wyndam-Pryce, who was distraught when Illyria's own resurrection destroyed his lover Fred, and convinces Severin to risk death by trying to save the world instead. Illyria stays with Severin as he tries to transfer his power into a new Seed of Wonder, which could restore magic to the whole world immediately. Severin expresses regret for his actions, but Illyria assures him he is giving the world something it needs. Severin explodes, seemingly killing himself along with the Old One Maloker and Illyria. His sacrifice restores magic to Earth and allows Willow to save Dawn.