Dispelling Exhale is a common Instant card from Tarkir: Dragonstorm (TDM), collector number 41. Current market price: $0.18 (foil $0.27), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, you may behold a Dragon. (You may choose a Dragon you control or reveal a Dragon card from your hand.) Counter target spell unless its controller pays {2}. If a Dragon was beheld, counter that spell unless its controller pays {4} instead.