The explosion unleashed enough energy to illuminate the entire higher plane. The event wasn't only powerful. It was also massive, and many battlefields outside the green cloud ended up being affected.
Of course, even if Marcella claimed to have bottomless energy reserves, her attacks couldn't have unlimited range. The wave of energy lost power before leaving the cloud, so the other major experts could easily fend it off once it reached their battlefield.
Still, that sheer show of power put Marcella above the other leaders in many experts' minds. She appeared far too strong to be a mere cultivator at the peak of the ninth rank.
The green cloud resumed its expansion once the bright energy left its edges. Magical plants grew and flourished due to the absence of attacks crashing on their structure.