Because They're Titans

Lucrezia smiled at his happiness and commented, ''Well, I will help you with whatever you need, Arch.''

Archer smiled when he heard her and spun on the Mosasaur girl before hugging her, which caused Lucrezia's cheeks to grow red. The two continued walking around the fortress as the soldiers finished building the walls.

Soon after it was completed, an alarm blared, prompting several soldiers to sprint toward the walkway. Archer and Lucrezia hurried after them, just in time to witness a massive horde of Ratlings, Blightborn, and Mutant Humans charging their way.

That's when the Dragonfire Company started firing their Dragonfire Howitzers. A wave of glowing mana shells arched over the newly constructed walls and landed on top of the monsters, causing an explosion.

The ground started to shake, but Archer and Lucrezia took off to fly over the wall. They saw even more monsters rushing out of a nearby hole that suddenly appeared a mile from the fortress.