Lu Yan, without using the Thunder Sword, had strength not inferior to the Immortal First Layer Heaven; if he used all his techniques, combined with Soul Attacks and the like, it wasn't impossible for him to fight and win.
After bringing out the Thunder Sword, he could completely suppress the Immortal First Layer Heaven.
Miao Yan was a good example of this.
After using the Thunder Sword, the gap between him and Immortal Second Layer Heaven wasn't that large, but this was under the premise that Immortal Second Layer Heaven didn't use any Immortal Skills; if the opponent utilized Immortal Skills, then Lu Yan would be completely unmatched.
"Kid, you dare to covet something that Skull Fire Mountain has set its sights on, oblivious to life and death, kill."
The old crone harshly yelled, her wings fluttering, flames covering the sky, condensing countless flaming arrows shooting at Lu Yan.
The dense sword intents, like a rain of fire, were unavoidable.