Asmesa, Mirrorrealm Rogue

+2: Draw a card. Put a 0/1 colorless Mirror artifact creature token onto the battlefield.
-X: Exile target creature with converted mana cost X. You may have all Mirror creatures you control become copies of the exiled creature.
-7: You get an emblem with, "Whenever you cast a creature spell, create a creature token that's a copy of that creature."