Tetsuko Umezawa, Pursuer is a uncommon Legendary Creature — Human Mercenary card from Reality Fracture (FRA), collector number 252. Current market price: $0.15 (foil $0.24), TCGplayer market prices via Scryfall.
Double strike Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever a creature an opponent controls with power or toughness 1 or less blocks, Tetsuko Umezawa deals 1 damage to that creature's controller.