Mantle of the Wolf is a rare Enchantment — Aura card from Theros Beyond Death Promos (PTHB), collector number 178s. Current market price: — (foil $0.44), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +4/+4. When this Aura is put into a graveyard from the battlefield, create two 2/2 green Wolf creature tokens.