Joker, the Trickster

Whenever you cast a creature spell, you may create a colorless Aura enchantment token named Persona attached to Joker. The token has enchant creature, totem armor, "When this enchantment enters the battlefield, exile target creature spell you control," and "Enchanted creature gets +X/+Y, where X is the exiled creature's power and Y is the exiled creature's toughness and has all abilities of the exiled creature."