Isaac, Magus Ascendant

Vigilance
Whenever you cast an instant or sorcery spell,
scry 1. If Isaac, Magus Ascendant attacked this
turn, you may reveal the top card of your library.
If an instant or sorcery spell is revealed this way,
put that card into your hand.
{t}: Draw a card, then discard a card.
Isaac, Magus Ascendant's power is equal to the
number of instant or sorcery cards in your
graveyard.