Parhelion Patrol is a common Creature — Human Knight card from Guilds of Ravnica (GRN), collector number 22. Current market price: $0.15 (foil $0.27), TCGplayer market prices via Scryfall.
Flying Vigilance (Attacking doesn't cause this creature to tap.) Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)