She is cursed with visions of monsters and suffering . . . and all her visions come true.

Eruth, Tormented Prophet

If you would draw a card, exile the top two cards of your library instead. You may play those cards this turn.

Innistrad: Double Feature

Innistrad: Crimson Vow Promos

Innistrad: Crimson Vow

"The blood is the life! The blood is the life!"

You may choose to apply Eruth's replacement effect even if there are fewer than two cards in your library. If there are no cards in your library, you won't exile any cards this way, but you also won't lose the game for having attempted to draw from an empty library.