Luxa River Shrine is a common Artifact card from Amonkhet (AKH), collector number 232. Current market price: $0.18 (foil $0.15), TCGplayer market prices via Scryfall.
{1}, {T}: You gain 1 life. Put a brick counter on this artifact. {T}: You gain 2 life. Activate only if there are three or more brick counters on this artifact.