Parhelion Patrol 
Creature — Human Knight
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.)
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL