The Dream Realm is a realm which can only be accessed by the nobles who are able to accomplish the Dreamer's Challenge. You get there using the finest art of Dreamwalking. In the past, the Dream Realm (also known as Dreampaths) were reknown gathering points of the Nightmare Knights for their attacks, plannings or simply gathering up. Due to a fight with the feared Ruthless Seven, who has led these knights to their untimingly demise, most of the dream realms were lost and dominated by these demons. The only Dream Realm left has the only survivor of the Nightmare Knights and also the only alive teacher of the arcane magics of necromancy, which would welcome you to the dreaded order of the Brotherhood of Bones.
To prevent unwise people from joining the esteemed ranks of the Nightmare Knights, the ancestors of this heroic order have created several riddles who's commonly called the Dream Challenge. Only those who can master this challenge may apply for joining the ranks of the Nightmare Knights.