Boom!
A flame rose from Cao Ke's hand, and at the moment the flame appeared, Zhang Qing and three others, including the flame beneath Chu Ning's elixir furnace, all experienced fluctuations.
All four of them hurriedly controlled their flames while their gazes turned toward the flame in Cao Ke's hand, which had by now settled beneath the elixir furnace.
"First Rank Earth Fire,"
Zhang Qing's expression turned ugly, as he hadn't expected Cao Ke to have mastered First Rank Earth Fire.
Earth Fire.
Naturally formed by heaven and earth, it was extremely rare; generally, if it existed, it was occupied by major powers, because the places where Earth Fire formed were often also mountains rich in Spiritual Energy.
To master a type of Earth Fire and be able to refine and control it, one must completely subjugate it.
This was something the powers that possessed Earth Fire would not allow.