The aggregated power of the Red Flame Sect's over a hundred thousand disciples only allowed the Thousand Laws Robe to transform two Karma Lotuses, not because the sect's cultivation methods are too lacking!
The main reasons are twofold: firstly, the Red Flame cultivators practice cultivation methods and magic from the same school, and Shen Mo has already mastered most of the top-tier methods among them, using them to transform the Karma Lotus; secondly, they have already been "nourished" by the torrent of spells from eight million Soul Generals, so similar cultivation methods and magic can no longer generate new Prohibition Lotuses.
It is foreseeable that as time progresses and as the number of Karma Lotuses continues to grow, it will become increasingly difficult to transform new Karma Lotuses in the future. But this also means the Thousand Laws Robe is getting closer to the level of "invulnerability to all Dharmas"!
