Mike_Lu
Im surprised he didn’t created -perfected rituals like: A perfect control Metamorphmagus, Multiple Animagus forms (including magical beast, which shares a portion of their powers in human form, like Phoenix=regeneration and Fullpower in transformed like Inmortality using a Dementor form), Immunity to the corruption of using the Dark Magic, Parseltongue and other Magical Languages like the Goblin One or Dovah (idk if it’s the same of skyrim but Merlin Did talked with dragons and it would make sense if it make the spells even more powerful) -A Manual to Increase Magical Power other than getting older, like moving your magic in some way or finding your core... idk -Teaching tips (let’s be honest he will probably teach Hermione and his own Friends and Romantic Partner/s so better to make yourself a perfect teacher) -Making Divination useful for once -The perfect Method to Learn Wandless Magic with efficiency