Satoru Umezawa is a rare Legendary Creature — Human Ninja card from Kamigawa: Neon Dynasty Promos (PNEO), collector number 234p. Current market price: $0.90 (foil $1.29), TCGplayer market prices via Scryfall.
Whenever you activate a ninjutsu ability, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. This ability triggers only once each turn. Each creature card in your hand has ninjutsu {2}{U}{B}.