Chapter 855: Chapter 855: Impenetrable Shield, Unstoppable Spear?!

Right before the muscular green merman retreated away and used the treasured boots' ability to vanish, Tang Li Xue had secretly put a tracker on it with her [Mapping Sense] skill.

Tang Li Xue sneered mischievously as she peeked at the map in her mind to track the exact location of the invisible muscular green merman.

But Tang Li Xue instantly felt dumbfounded when she still could not find the invisible muscular green merman's location even with her [Mapping Sense] skill!

Yes, her [Mapping Sense] tracker also disappeared when that muscular green merman vanished!

"Damn it~! How can it be?!" Tang Li Xue angrily cursed in frustration.

Then she immediately realized that her [Mapping Sense] was only an ordinary skill after all. She had not even merged or upgraded it to divine ability yet, so it made sense that it could not compete with the ability of the treasured boots.