Shadow, Mysterious Assassin is a rare Legendary Creature — Human Assassin card from Final Fantasy Commander (FIC), collector number 148. Current market price: $0.83 (foil $6.23), TCGplayer market prices via Scryfall.
Deathtouch Throw — Whenever Shadow deals combat damage to a player, you may sacrifice another nonland permanent. If you do, draw two cards and each opponent loses life equal to the mana value of the sacrificed permanent.