Guardians of Akrasa is a common Creature — Human Soldier card from Magic 2013 (M13), collector number 18. Current market price: $0.14 (foil $0.38), TCGplayer market prices via Scryfall.
Defender (This creature can't attack.) Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)