To protect the Vessel, the Dreamers lay sleeping. Through their devotion, Hallownest lasts eternal. The Dreamers are three beings who entered into an eternal sleep in order to use their power to seal away the Hollow Knight. The ones who became the Dreamers are Monomon the Teacher, Lurien the Watcher, and Herrah the Beast. Their seals are present on the exterior of the Black Egg located in the Temple of the Black Egg. The Knight encounters two projections of the Dreamers.