Dr. Toxicophilous gives Ignatz the key to Primavera's matrix, he inserts it into her umbilical and the dreamers are returned to the reality of Spalanzani's workshop.
Dr. Toxicophilous gives Ignatz a key that unlocks Primavera's matrix, which he uses to insert it into her umbilical cord. This action allows the dreamers to return to the real world of Spalanzani's workshop.