Zhou Yu was taken aback.
"What?"
"These Dark Demon Qi originally did not exist."
"However, after the Dark Origin invaded this place, it polluted the Heaven and Earth Spiritual Power here and transformed it into Dark Demon Qi."
"But this transformation is not a one-to-one conversion."
"It often requires a lot of Heaven and Earth Spiritual Power to convert into a small portion of Dark Demon Qi."
"And to condense a Demon General requires an even more massive amount of Dark Demon Qi."
"The Demon General just now was slain by your Heavenly Punishment Divine Thunder because it can purify the Dark Origin within the demon qi."
"Which allows the Dark Demon Qi to revert back to Heaven and Earth Spiritual Power."
