Now, this group of mutant creatures really has the feel of an army!
Looking at the orderly beast army outside, the smile on Xu Xin's lips grew wider.
If only the plant heart was defending his treehouse, such an attack might truly leave him scrambling.
But he also had the treehouse's ballista and electric net, especially the explosive bolts, the denser they were deployed, the greater the damage they caused!
A peculiar and piercing sound rang out, it was that whistle again!
The mutant creature army moved upon hearing it, the neatly packed ranks all sprang up, rushing towards Xu Xin's treehouse!
"Attack!" Xu Xin shouted.
Lou Fei'Er immediately went into action, controlling the ballista around the treehouse to launch an attack!
The two treehouse ballistae that could target the northwest slightly lifted, continuously launching explosive bolts in that direction!
