Looks like this is the innermost, sealed area where the key should be present. It is sealed by a very powerful person, still, I can feel the ominous presence inside this room. It is most likely going to be the most dangerous thing I have ever encountered until now. Since I don't have any other choice then I will face it head-on.
"Haha hahaha! looks like after so many years, I Xeberus am going to be finally free, that despicable human sealed me here, after slaying my whole kind, I will take my revenge by slaying all the humans."
(A monster with a human-like body, with red eyes and white skin, was floating inside the room and was guarding the key.)
I don't want to do this but you forced me to say this.
"Hah! you pathetic, creature how dare you to be so arrogant in front of me, the "Great Hero"?" Damm this is so embarrassing but Avila said that if I tell him this he will be afraid of me.