Fiendslayer Paladin is a rare Creature — Human Knight card from The List (PLST), collector number M14-18. Current market price: $3.82, TCGplayer market prices via Scryfall.
First strike (This creature deals combat damage before creatures without first strike.) Lifelink (Damage dealt by this creature also causes you to gain that much life.) This creature can't be the target of black or red spells your opponents control.