Taste for Mayhem is a common Enchantment — Aura card from Ravnica Remastered (RVR), collector number 127. Current market price: $0.21 (foil $0.27), 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.