Mu Fan was not surprised about not defeating his opponent; instead, he was surprised by his opponent's complete lack of resistance under his fire techniques.
Of course, the opponent was also smart and did not choose to contest mana with him. Had he done so, the battle's outcome would already be decided.
The fire techniques lack penetration capability, and more importantly, the opponent's Body Sword Integration made it difficult for his fire techniques to exert their full power. Though at an advantage, he couldn't secure victory; however, it was fine. After all, this was an emissary from the Upper Realm. If he were taken down by just a round of fire techniques, Mu Fan would have doubted this person's true identity.
As thoughts swirled in his mind, he kept maneuvering; within his Sea Of Consciousness, a blue Dao God descended, pushing away the Fire Governor, and settled in his consciousness, immediately transforming his temperament from fiery restlessness to calmness like water.