Almost all of them were related to detection. Chen Fei had naturally fused Sword Eye with those three techniques before. It was just that he rarely used the fused technique afterward.
It was not that the fusion had failed, but that the fused technique consumed an outrageously large amount of Spiritual Power. Even with Chen Fei's mental strength, he could not sustain it for long.
It was as though quantitative change had produced qualitative change. Those three techniques had each gone extremely far in their respective specialties. Thus, there was no question of their strengths making up for one another's weaknesses after fusion.
They were simply a union of the strong with the strong, becoming something even stronger.
Yet under normal circumstances, Chen Fei had no need for such formidable searching ability, so operating just one of the techniques was usually enough. Even operating all three techniques together did not consume Spiritual Power as extravagantly as the fused technique did.
Still, though the consumption of Spiritual Power was so immense that it could not be sustained for long, its effect truly was powerful.
Chen Fei's figure flickered as he sped along the red line in his vision. In only a moment, he arrived at a mountain range.
Here, the red line vanished into a cliff face.
That cliff face looked no different whatsoever from any other part of the mountains, but Chen Fei knew that the red Battle Flag was within it.
Along the way, the other party had apparently feared that someone might follow its aura and pursue them. They had even used a Formation Disk to conceal the Battle Flag's aura before slowly flying here.
Unfortunately, the fused Heavenly Eye now tracked both aura and traces.
"There's only one person. No need to call them over."
Chen Fei's