Templar Knight is a uncommon Creature — Human Knight card from Assassin's Creed (ACR), collector number 10. Current market price: $1.68 (foil $1.96), TCGplayer market prices via Scryfall.
Vigilance {W}, Tap five untapped attacking creatures you control named Templar Knight: Search your library for a legendary artifact card, put it onto the battlefield, then shuffle. A deck can have any number of cards named Templar Knight.