This was quite normal. Beings with special powers could resist having their blood drained while alive, slowing down the speed of getting sucked dry. Once dead, they had no resistance, and Zheng Yichen could drain them completely in a very short period.
By the time another earth dragon recovered, the one targeted by Zheng Yichen had been drained dry and died completely. The feedback was only mediocre since he had already dealt with many of the native extraordinary creatures of this world.
The feedback from hunting the same powerful beings repeatedly would only decrease over time. Initially, it was about quality, but later it had to be about quantity. However, this didn't weaken Zheng Yichen, for the decrease in feedback naturally stemmed from his own improvement in quality.
If his base strength suddenly reverted to that of an ordinary person, then killing another powerful extraordinary creature in this world would yield unprecedentedly high feedback.
