Brawler's Plate is a uncommon Artifact — Equipment card from Magic 2015 (M15), collector number 213. Current market price: $0.13 (foil $0.41), TCGplayer market prices via Scryfall.
Equipped creature gets +2/+2 and has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.) Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.)