This clever setup relies on Displaced Dinosaurs to turn every Clue token you create into a massive 7/7 creature the moment it enters the battlefield. You can feed one of these newly minted dinosaur artifacts directly into Umbral Collar Zealot's sacrifice ability to surveil your library. That death triggers Nick Valentine, Private Eye, who creates a brand-new Clue token to replace the one you lost. Because that new Clue immediately transforms into an artifact creature under Displaced Dinosaurs, you have a fresh sacrifice ready for Umbral Collar Zealot to repeat the loop indefinitely.