[RPG] Can you use a Dragon’s Change Shape Ability to Turn Back Into Yourself

dnd-5edragonspolymorphshapeshifter

If you are a level 20 Wizard who is True Polymorphed into an Ancient Brass Dragon, can you then use the Dragon's Change Shape ability to turn back into a level 20 Wizard, maintaining all your class abilities, but also gaining the dragon's hit points, and various other statistics listed in the text of Change Shape?

Best Answer

No, you can't do this. Change Shape lets a dragon turn into "a humanoid or beast that has a challenge rating no higher than its own".

A level 20 wizard doesn't have a challenge rating. You could turn into the CR 12 Archmage, if you wanted, but you couldn't become any player character, because player characters don't have challenge ratings.