Henkan,Master of Identities

You may have Henkan, Master of Identities enter the battlefield with X loyalty counters on him and as a copy of any planeswalker on the battlefield. If you do, his subtype becomes Henkan.
The words of his professor echoed in his head, "the form of a Ploymorphist is naturally resistant to polymorphic magic, making it very hard to go back and forth between forms..." However, for him, it was as easy as changing clothes. It slowly dawned on him how powerful he had become.