Reincarnate (Fantastic Beasts)

We all know that Merlin and King Arthur existed, even muggles acknowledge it in an odd way. The order of Merlin was once a great organization. Nowadays it is just an honor received by Wizards and Witches who have performed great feats. What if the order was still around.. What if the prophecy of the reincarnation of King Arthur and Merlin was true?
Newt Scamander was minding his own business following after a strange creature he thought needed help. He arrives in a strange cavern to find an orb with the Mark of Merlin on it. What happens when this lone adventurer grasps the orb in his hand? Who and what will he meet? What kind of adventures are in store now?