The new technique Ren was developing required him to maintain multiple streams of mana flowing simultaneously through different pathways in his body... It was exhausting to maintain.
Each practice session brought incremental improvements, but also reminded him how effortless such complex mana manipulation had been when his fungus handled the underlying coordination. Now every adjustment required conscious decision-making, every element switch demanded deliberate effort.
Still, the hope that this training might eventually help him understand his fungus's condition gave him motivation to push through the discomfort and frustration of learning to do manually what had once been automatic.
Obviously Ren not only practiced alone.
The battles with Lin continued to be 'brutally educational'. Zhao and Wei had also participated, and Ren felt it was overkill now.
Lin was more than enough, he thought.