Sword of War and Peace is a mythic Artifact — Equipment card from Double Masters (2XM), collector number 300. Current market price: $10.02 (foil $13.60), TCGplayer market prices via Scryfall.
Equipped creature gets +2/+2 and has protection from red and from white. Whenever equipped creature deals combat damage to a player, this Equipment deals damage to that player equal to the number of cards in their hand and you gain 1 life for each card in your hand. Equip {2}