LGfM 174 The fight is not even 

-playlist of this chapter: Fight Song by Rachel Platten 

... 

Aunt Helena's voice suddenly turned hoarse and hoarse, like someone with strep throat, and Aunt Helena's face, which was once beautiful and graceful, turned ghastly like an old, wizened witch. 

Such an appearance was not the effect of using the earth elemental power that Aunt Helena had mastered since she was young. This has something to do with the black shadow figure that Petra had observed entering the body of Aunt Helena. 

In addition, Aunt Helena suddenly howled full of horror mixed between sadness, pain, anger, and despair. It's a combination that can't be translated with just a few lines of sentences. What they are dealing with is not only a woman in her late thirties who has the power of controlling the earth element but also an invisible evil figure who has entered Aunt Helena's body.