Mystic Unraveler

When Mystic Unraveler enters the battlefield
create an Enchantment - Aura Mask token and
attach it to Mystic Unraveler.
As long as Mystic Unraveler is enchanted, it
gets unblockable.
When Mystic Unraveler deals combat damage
to a player, that player puts two cards from the
top of their library into their graveyard.