Raiyuu, Storm's Edge is a rare Legendary Creature — Human Samurai card from Kamigawa: Neon Dynasty Promos (PNEO), collector number 232p. Current market price: $0.44 (foil $0.85), TCGplayer market prices via Scryfall.
First strike Whenever a Samurai or Warrior you control attacks alone, untap it. If it's the first combat phase of the turn, there is an additional combat phase after this phase.