Taste for Mayhem is a common Enchantment — Aura card from Dissension (DIS), collector number 75. Current market price: $0.10 (foil $0.19), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+0. Hellbent — Enchanted creature gets an additional +2/+0 as long as you have no cards in hand.