Sunblade Samurai is a common Enchantment Creature — Human Samurai card from Kamigawa: Neon Dynasty (NEO), collector number 315. Current market price: $0.13 (foil $0.35), TCGplayer market prices via Scryfall.
Vigilance (Attacking doesn't cause this creature to tap.) Channel — {2}, Discard this card: Search your library for a basic Plains card, reveal it, put it into your hand, then shuffle. You gain 2 life.