Veil of Summer is a rare Instant card from Secret Lair Drop (SLD), collector number 2348. Current market price: $16.56 (foil $15.77), TCGplayer market prices via Scryfall.
Draw a card if an opponent has cast a blue or black spell this turn. Spells you control can't be countered this turn. You and permanents you control gain hexproof from blue and from black until end of turn. (You and they can't be the targets of blue or black spells or abilities your opponents control.)