
At the beginning of your end step, you may reveal the top card of your library. If you do, each opponent loses life equal to that card's mana value.
Baneful Omen has 1 printing, first in Rise of the Eldrazi (2010). EDHREC ranks it #10,286 among Commander cards. It appears most in Marvo, Deep Operative decks (4,573 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.