Skullsnap Nuisance is a uncommon Creature — Insect Skeleton card from Duskmourn: House of Horror (DSK), collector number 234. Current market price: $0.18 (foil $0.25), TCGplayer market prices via Scryfall.
Flying Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)