บท 562: Chapter 397: Whose Blood is the Sick Blood?_2

After all, it's only the initial level, so it cannot cover everything in a comprehensive manner.

However, it's high time to upgrade the Surveillance Technique, especially as Jiang Hui plans to make extensive use of this skill in the future, but this is undoubtedly the most challenging point.

The Surveillance Technique cannot be upgraded. To achieve a stronger version, it has to be developed from the dragon egg, which obviously requires the embodiment of the emperor.

...

Above the purplish-red unidentified liquid, the flames continued to burn, the piercing shriek sounded continuously, without ever stopping, even though the power of the fireball had burned to the extreme but was still not wavered.

The bizarre existence named by the Surveillance Technique as tainted blood was shrieking and growling, but it did not sustain any damage, only making the bad smell in the air thicker, almost hitting in the face.