Undying Rage is a uncommon Enchantment — Aura card from Time Spiral (TSP), collector number 184. Current market price: $0.19 (foil $0.35), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+2 and can't block. When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.