Penumbra Umbra is a rare Enchantment — Aura card from Mystery Booster 2 (MB2), collector number 580. Current market price: $0.20, TCGplayer market prices via Scryfall.
Enchant creature you control When Penumbra Umbra is put into a graveyard from the battlefield, create a token that's a copy of enchanted creature, except the token is black. Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)