32 cards where the set is “dsc” and the collector number >= 9 and the collector number <= 40

Ancient Cellarspawn (Duskmourn: House of Horror Commander #16)
Barbflare Gremlin (Duskmourn: House of Horror Commander #26)
Convert to Slime (Duskmourn: House of Horror Commander #37)
Cramped Vents // Access Maze (Duskmourn: House of Horror Commander #17)
Curator Beastie (Duskmourn: House of Horror Commander #30)
Deluge of Doom (Duskmourn: House of Horror Commander #18)
Demolisher Spawn (Duskmourn: House of Horror Commander #31)
Demonic Covenant (Duskmourn: House of Horror Commander #19)
Disorienting Choice (Duskmourn: House of Horror Commander #32)
Experimental Lab // Staff Room (Duskmourn: House of Horror Commander #33)
Fear of Sleep Paralysis (Duskmourn: House of Horror Commander #12)
Formless Genesis (Duskmourn: House of Horror Commander #34)
Giggling Skitterspike (Duskmourn: House of Horror Commander #39)
Gleeful Arsonist (Duskmourn: House of Horror Commander #27)
Glitch Interpreter (Duskmourn: House of Horror Commander #13)
Into the Pit (Duskmourn: House of Horror Commander #20)
Metamorphosis Fanatic (Duskmourn: House of Horror Commander #21)
Persistent Constrictor (Duskmourn: House of Horror Commander #22)
Phenomenon Investigators (Duskmourn: House of Horror Commander #38)
Polluted Cistern // Dim Oubliette (Duskmourn: House of Horror Commander #23)
Redress Fate (Duskmourn: House of Horror Commander #9)
Sadistic Shell Game (Duskmourn: House of Horror Commander #24)
Séance Board (Duskmourn: House of Horror Commander #40)
Secret Arcade // Dusty Parlor (Duskmourn: House of Horror Commander #10)
Shriekwood Devourer (Duskmourn: House of Horror Commander #35)
Soaring Lightbringer (Duskmourn: House of Horror Commander #11)
Spiked Corridor // Torture Pit (Duskmourn: House of Horror Commander #28)
Star Athlete (Duskmourn: House of Horror Commander #29)
Suspended Sentence (Duskmourn: House of Horror Commander #25)
They Came from the Pipes (Duskmourn: House of Horror Commander #14)
Ursine Monstrosity (Duskmourn: House of Horror Commander #36)
Zimone's Hypothesis (Duskmourn: House of Horror Commander #15)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.