Demoralize

All creatures gain menace until end of turn. (They can't be blocked except by two or more creatures.) Threshold — If there are seven or more cards in your graveyard, creatures can't block this turn.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o7aoz4fnjpb1h1h20j7my.