Knights of Thorn is a rare Creature — Human Knight card from The Dark (DRK), collector number 11. Current market price: $8.96, TCGplayer market prices via Scryfall.
Protection from red; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)