Sanctum of Shattered Heights is a uncommon Legendary Enchantment — Shrine card from Core Set 2021 (M21), collector number 157. Current market price: $0.39 (foil $1.88), TCGplayer market prices via Scryfall.
{1}, Discard a land card or Shrine card: Sanctum of Shattered Heights deals X damage to target creature or planeswalker, where X is the number of Shrines you control.