Cyn, Master of the Illusory

When Cyn, Master of the Illusory enters the
battlefield, you may search your library for an
Illusion card and reveal that card. Shuffle your
library, then put the card on top of it.
Illusion creatures you control get +1/+0 and have
"Whenever this creature would deal damage to a
player, prevent that damage. That player puts that
many cards from the top of their library into their
graveyard."