Ward of Lights is a common Enchantment — Aura card from Mirage (MIR), collector number 47. Current market price: $0.28, TCGplayer market prices via Scryfall.
You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step. Enchant creature As this Aura enters, choose a color. Enchanted creature has protection from the chosen color. This effect doesn't remove this Aura.