Abandon Reason is a uncommon Instant card from Eldritch Moon (EMN), collector number 115. Current market price: $0.15 (foil $0.38), TCGplayer market prices via Scryfall.
Up to two target creatures each get +1/+0 and gain first strike until end of turn. (They deal combat damage before creatures without first strike.) Madness {1}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)