Pentarch Ward is a common Enchantment — Aura card from Time Spiral (TSP), collector number 33. Current market price: $0.16 (foil $0.64), TCGplayer market prices via Scryfall.
Enchant creature As this Aura enters, choose a color. When this Aura enters, draw a card. Enchanted creature has protection from the chosen color. This effect doesn't remove this Aura.