Man of Measure 
Creature — Human Knight
As long as you're shorter than an opponent, Man of Measure gets +0/+1 and has first strike. As long as you're taller than an opponent, Man of Measure gets +1/+0.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL