Threats Around Every Corner is a uncommon Enchantment card from Duskmourn: House of Horror (DSK), collector number 200. Current market price: $0.28 (foil $0.34), TCGplayer market prices via Scryfall.
When this enchantment enters, manifest dread. Whenever a face-down permanent you control enters, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.