Wonderstruck

Until end of turn, creatures you control gain "Whenever this creature deals combat damage
to a player, draw a card." and "Whenever you draw a card, you may tap target creature.
It doesn't untap during its controller's next
untap step." and "Whenever a creature you
don't control is tapped for any reason, this creature deals 2 damage to it."
In awe of her power, it took one mistake to spiral to their downfall.