Syvne, Who Whispers Twice

At the beginning of your end step, if you did not
cast a creature spell this turn, you may manifest
the top card of your library.
During each of your turns, instant and
sorcery spells you cast cost {x} less to cast,
where X is equal to the number of face-down
creatures you control.
{g}{u}{r}, {t}: Scry 2.