Boar Umbra is a uncommon Enchantment — Aura card from Rise of the Eldrazi (ROE), collector number 179. Current market price: $0.31 (foil $0.95), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +3/+3. Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)