"At that point, we were already at a disadvantage. It was a good thing that my disciple knew some martial arts. Because of him, I wasn't injured...but he was."
"After that, we were injected with some unknown drug. At that point, we didn't know what happened next."
Elder Chen recounted his experiences.
Everyone knew what happened after.
For the Inner Sect Disciples who have managed to cultivate their spiritual power, the anesthesia is provided by general hospitals was considered to be ineffective.
Yet, the drug that was used against him was completely unfamiliar. He didn't expect that he'd fall into a very drowsy state in a short period of time. He couldn't even stay awake!
The drug must've been specially developed to anesthetize people with high mental strength and ability. The drugs might have been artificially developed to reach their maximum potential.
However it wouldn't be enough for them to simply inject them with the drug.