Zhalfirin Crusader is a rare Creature — Human Knight card from Visions (VIS), collector number 25. Current market price: $0.65, TCGplayer market prices via Scryfall.
Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.) {1}{W}: The next 1 damage that would be dealt to this creature this turn is dealt to any target instead.