The sound from Xu Xin's watch was audible, and Ma Hongwei and Zeng Tao could hear it.
Both of them were surprised, and turned to look at Xu Xin's watch.
"Underground? Did they dig in from underground?" Zeng Tao exclaimed.
"Underground..." Ma Hongwei immediately frowned.
The sky and ground are manageable, but underground...
His abilities seemed unable to handle this situation.
Xu Xin thought quickly about many things.
Dug in from underground... This possibility should have been considered earlier!
Although there is a safety zone around the treehouse, with roots protecting the surrounding land from harm, but...
That might only be effective against those low-level wild mutated creatures and plants!
And at this time, the World Tree hasn't fully grown, its roots are at their most vulnerable.
Could it be... they intend to destroy the roots of the World Tree?!
No... That shouldn't be it.
