Alhazred, the Occultist

Whenever Alhazred, the Occultist enters the battlefield or attacks, you may pay 4 life. If you do, scry 3 and draw a card.
Position 3 or 4 — {u}{b}, {t}: Exile target instant or sorcery card from a graveyard. You may cast that card this turn. If you do, you lose 2 life.
"To fight the abyss, one must know it,"
— the Ancestor