But there are differences as well. For instance, if harmed by humans or if it develops a strong obsession, a spirit can turn into a harmful nightmare. Unlike spirits, nightmares possess powerful attack strength!
The house nightmare that Situ Shuangshuang encountered now must have evolved from the house spirit of that opera house!
When Situ Shuangshuang entered, she noticed that the barrier set by the house nightmare can block the exploration of the Yin Yang Two Realms from the outside, and inside it can trap the souls, preventing them from leaving. Observing the continuous opera performances at this place, Situ Shuangshuang speculated that this house nightmare might have been a house spirit born from the people's affection toward the opera house performances!
