Rowling actually wrote and published a version of "Fantastic Beasts" for us muggles to read. The book is an encyclopedia of creatures, with a foreword from Dumbledore himself. The niffler and bowtruckle are definitely in it.
Oak King From the set of the Enchanted Forest. The green man is a classic character and this is an oak themed image with celtic style branch designs. I imagine him emerging from the trees and looking down over the enchanted wood as guardian.