Kolaghan, the Storm's Fury is a rare Legendary Creature — Dragon card from Fate Reforged (FRF), collector number 155. Current market price: $0.75 (foil $4.81), TCGplayer market prices via Scryfall.
Flying Whenever a Dragon you control attacks, creatures you control get +1/+0 until end of turn. Dash {3}{B}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)