Vow of Torment is a uncommon Enchantment — Aura card from Game Night: Free-for-All (GN3), collector number 65. Current market price: $0.37, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+2, has menace, and can't attack you or planeswalkers you control. (It can't be blocked except by two or more creatures.)