Should he be a normal trialist like Sai'er or Gray? Or become a nightmare embodiment like the old witch?
If the identity of a normal trialist offers the path for the average person, then the nightmare embodiment is essentially a hidden route tailored for Professionals and those who have acquired certain Dream Realm knowledge.
The old witch's soup in front of him is the 'special item' that unlocks this hidden route. From this soup, Anvis obtained more fragmented information about the alternate path.
There is no superiority between these two pathways; the difference lies only in their focus and process.
A normal trialist, to ultimately gain the inheritance, must face various challenges, using every mean possible to pass through them.
With each challenge successfully overcome, the trialist's strength is enhanced, which includes both the power infusion from the Dream Realm's own rules for those who pass and certain special items gained during the trials.