*Ngunng!*
A loud echo shook the entire plain. No other creature in this world other than the aliens could make such a sound.
Standing on the other side of the plain was a fortress. The commander of that fortress couldn't help but furrow his eyebrows, staring into the distance.
Numerous aliens were charging toward this fortress.
"This is…" The commander could see the number of aliens coming. The scale of the attack was beyond anything he had seen before.
"How could there be so many aliens here?" The commander didn't know what was going on. All he knew was that whatever the sound earlier, it was capable of summoning all these aliens.
"Get ready! We will stop them here!" The commander gave an order out loud as a sword appeared on his waist. "We have repelled them so many times. We can repel the aliens again!"
"Uoohhh!" The soldiers screamed at the top of their lungs, showing their high morale.
To everyone's surprise, a crack suddenly appeared inside the fortress.
