Then next...
Luo Chen opened his mouth and spat.
A wisp of green flame leisurely flew out and in the void transformed into the shadow of a small tree ten feet tall.
The small tree stood in midair, its roots directly plunged into the red cloud flame.
"Fourth-Order Sourceless Fire, refining it might take quite some time."
Luo Chen murmured to himself and immediately sat cross-legged in the void, unhurriedly initiating his natal qi technique.
When he ventured once more to urge the original source true fire to devour the sourceless fire, he suddenly discovered that the refining speed seemed much faster than before.
"Eh?"
"Why is it so easy, seemingly even smoother than refining Third-Order Sourceless Fire before?"
Luo Chen was extremely astonished.
While refining the sourceless fire, he searched for the cause of this change.
"Is it that the order of my Prosperity and Decline True Fire is getting higher?"
