Taii Wakeen, Perfect Shot is a rare Legendary Creature — Human Mercenary card from Outlaws of Thunder Junction (OTJ), collector number 365. Current market price: $0.72 (foil $0.94), TCGplayer market prices via Scryfall.
Whenever a source you control deals noncombat damage to a creature equal to that creature's toughness, draw a card. {X}, {T}: If a source you control would deal noncombat damage to a permanent or player this turn, it deals that much damage plus X instead.