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"This... this is impossible!" Staring dumbfounded at the dust scattering across the sky, Wang Kui couldn't believe it and cried out in disbelief. This was a crystal six-star Great Mud Dragon, how could it possibly be defeated so easily!
In fact, it wasn't entirely due to the power of the Sword of Slaughter Immortal; more importantly, it was because the very nature of the Great Mud Dragon was excessively vulnerable to the Sword of Slaughter Immortal—it was a more severe weakness than the Great Mud Dragon's advantage over Yinglong, almost to the extent of no chance of reincarnation.
If the Sword of Slaughter Immortal were used against other mud dragons, for example, the Earth Series' Stone Dragon, at most, it would pierce a hole; although there was a weakness, it would not be so powerful.