The door to the cemetery was right in front of their eyes. It was just as Hessiana had said; it was a barrier formed by twisted thorns and roses. The strange barrier was in front of the foyer on the north side of the castle. It extended out infinitely on both sides and above as if dividing the world in half. Supposedly, a barrier of that size was hard to miss. Hao Ren and Lily should have seen it when they were in the courtyard. But in reality, the wall did not appear until they crossed the foyer.
Apparently, it was a strange spatial phenomenon, or perhaps, a purely spiritual illusion.
However, with real bones piling up under the Wall of Roses, even a fool would not think that the barrier was just a harmless illusion.