Retreat to Coralhelm is a uncommon Enchantment card from Duskmourn: House of Horror Commander (DSC), collector number 126. Current market price: $0.41, TCGplayer market prices via Scryfall.
Landfall — Whenever a land you control enters, choose one — • You may tap or untap target creature. • Scry 1. (Look at the top card of your library. You may put that card on the bottom.)