When Rox and his subordinates returned, Rox finally burnt down the Marva plant with the help of Au. The Marva tree had already started taking over the place it was left at.
When he was done, he went into his tent and started a long conversation with Ansah after which he started levelling up his [Gale] skill using its duplicates.
After levelling the [Gale] skill up to level forty-five, and fusing his [Advanced Appraisal], [Field Detection] and [Area Awareness] skills together to create an elite skill called [Field Appraisal] which allows him to both detect and appraise anything in his field, Rox gained more than nineteen billion experience points.
This effectively raised his level to level twenty-five. Any more and he would have collapsed.
After that, Rox decided to test his new elite skill. The moment he activated it, he started detecting everything that was within a five hundred metres radius of him. This detection is not linear like how one sees with the eyes.