Nagao, Bound by Honor is a uncommon Legendary Creature — Human Samurai card from The List (PLST), collector number CHK-36. Current market price: $0.32, TCGplayer market prices via Scryfall.
Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.) Whenever Nagao attacks, Samurai creatures you control get +1/+1 until end of turn.