Boar Umbra is a uncommon Enchantment — Aura card from Ultimate Masters (UMA), collector number 158. Current market price: $0.26 (foil $0.78), 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.)