Arashi, the Sky Asunder is a rare Legendary Creature — Spirit card from Saviors of Kamigawa (SOK), collector number 121. Current market price: $0.42 (foil $4.77), TCGplayer market prices via Scryfall.
{X}{G}, {T}: Arashi deals X damage to target creature with flying. Channel — {X}{G}{G}, Discard this card: It deals X damage to each creature with flying.