Dragon Breath is a common Enchantment — Aura card from Scourge (SCG), collector number 86. Current market price: $0.30 (foil $3.12), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature has haste. {R}: Enchanted creature gets +1/+0 until end of turn. When a creature with mana value 6 or greater enters, you may return this card from your graveyard to the battlefield attached to that creature.