Ring of Valkas is a uncommon Artifact — Equipment card from Magic 2013 (M13), collector number 214. Current market price: $0.41 (foil $3.37), TCGplayer market prices via Scryfall.
Equipped creature has haste. (It can attack and {T} no matter when it came under your control.) At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's red. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)