Lion Umbra is a uncommon Enchantment — Aura card from Modern Horizons 3 (MH3), collector number 426. Current market price: $0.28 (foil $0.31), TCGplayer market prices via Scryfall.
Enchant modified creature (Equipment, Auras its controller controls, and counters are modifications.) Enchanted creature gets +3/+3 and has reach and vigilance. Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)