Consuming Fervor is a uncommon Enchantment — Aura card from Amonkhet (AKH), collector number 126. Current market price: $0.15 (foil $0.43), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +3/+3 and has "At the beginning of your upkeep, put a -1/-1 counter on this creature."