He had been following us an hour after we left the hills.
He had been extremely discreet and maintained a large distance, that even Wanya couldn't sense him.
I did with my soul waves.
Every few minutes, I would release extremely faint waves of soul sense.
Usually, such methods are easy to detect, but thanks to the clever formation and tiny bit of forbidden energy naturally present in it. My waves are hard to detect.
He had followed us for hours before revealing himself.
It is not suspicious behavior; considering it was us who were acting suspiciously as we moved unconscious people into the dangerous place.
Still, I couldn't take the risk and used my strings.
Usually, I wouldn't dare to use them against the energy as strong as this one, but I had hours to do it and, at such time, I could use them without being detected.
