With Emperor Voldemort defeated, the Fantastic Beasts were free to return to their own world. However, before they could do so, they had to face another powerful enemy: the powerful dark wizard Grindelwald. Grindelwald had been trying to take control of both worlds for years, and he had finally found a way to do so. Simon and the Beasts soon found themselves in a desperate battle against Grindelwald and his forces. Despite their best efforts, the Beasts were unable to prevail against the powerful wizard and his allies. Just as all seemed lost, a mysterious creature appeared: Fawks the Phoenix. Fawks revealed that he had been sent by a powerful force to help Simon and the Fantastic Beasts. He gave them a powerful artifact, the Holy Weshandi Magic Book, which contained the secrets of how to defeat Grindelwald. With this book in hand, they were able to defeat the powerful wizard and finally end his reign of terror.