章 169: Chapter 170 Super Fighter Planes Made in the Doomsday Refuge

May 8th.

Jack got up early in the morning to inspect the preparation of the superheroes for the soil materials when he got an urgent notice from the system.

Master, please note: there are only 6 days left before the doomsday. Please be prepared for the enemy's invasion. Alien creatures are about to invade the Earth!"

"The speed at which these alien creatures move is truly amazing!" Jack scratched his head, a little annoyed.

The feeling of being pressed by time would make people unhappy.

Today, Jack only had 7 days to prepare, so he had to hurry up.

This morning, all the superheroes began to work crazily on the third floor of the basement.

They laid the black soil which was moved from somewhere in the world one after another on the ground and then began to loosen the soil and divide the planting area.

By noon, the whole land had been completed.

During the working hours of the superheroes, Jack was not idle at all.