It's Learning

The Emperor Tree created its own mechs!

This was a capability that the calamity plant had never shown before!

The fact that the tree felt the need to produce its own version of mechs also indicated that it had adopted a deliberate strategy to deal with the invading humans.

All of this had scary implications. Many thoughts ran through the minds of the mech pilots. Each of them began to feel more and more that they had underestimated the depth of the Emperor Tree.

Even though the initial wave of wooden mechs had been dealt with remarkable ease, none of the mech pilots dared to relax.