Bear Umbra is a rare Enchantment — Aura card from Wilds of Eldraine Commander (WOC), collector number 121. Current market price: $14.05, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+2 and has "Whenever this creature attacks, untap all lands you control." Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)