Siegfried, Famed Swordsman is a rare Legendary Creature — Human Warrior Rogue card from Final Fantasy Commander (FIC), collector number 51. Current market price: $0.28, TCGplayer market prices via Scryfall.
Menace When Siegfried enters, mill three cards. Then put X +1/+1 counters on Siegfried, where X is twice the number of creature cards in your graveyard.