Spectra Ward is a rare Enchantment — Aura card from Magic 2015 (M15), collector number 36. Current market price: $2.35 (foil $13.34), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +2/+2 and has protection from each color. This effect doesn't remove Auras. (It can't be blocked, targeted, or dealt damage by anything that's white, blue, black, red, or green.)