Ephemeral Shields is a common Instant card from Magic 2015 (M15), collector number 11. Current market price: $0.23 (foil $0.74), TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)