That was because Meng Fan had previously only prepared to fuse three types of true qi, but Old Lin had forcefully added a fourth type into him.
Therefore, at this moment, even though Meng Fan had never practiced fire-attribute true qi before, his true qi now possessed the attribute of fire.
Wind, fire, thunder, and demonic energy—the true qi inside him now simultaneously possessed all four of these attributes, which could simply be described as shocking to the world.
Chapter 176