Isshin, Two Heavens as One is a rare Legendary Creature — Human Samurai card from Kamigawa: Neon Dynasty Promos (PNEO), collector number 224p. Current market price: $4.42 (foil $4.95), TCGplayer market prices via Scryfall.
If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.