Silumgar's Scorn is a uncommon Instant card from Dragons of Tarkir (DTK), collector number 78. Current market price: $0.27 (foil $1.56), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, you may reveal a Dragon card from your hand. Counter target spell unless its controller pays {1}. If you revealed a Dragon card or controlled a Dragon as you cast this spell, counter that spell instead.