Rainbow Dash

Mana cost: {1}{R}{W}

Legendary Creature — Pegasus

Flying, haste Whenever a creature you control with flying and/or haste attacks, you get 20% cooler. (You start at 0% coolness.) Sonic Rainboom — {T}: If you're at least 100% cool, add {W}{U}{B}{R}{G}, draw a card, and reset your coolness.