บท 1618: Threat

*Bang!*

*Bang!*

*Bang!*

The birds continuously hit them as if trying to destroy the plane, but the barrier that the pillar erected protected them the whole time. Not even a single scratch was visible on the surface.

"Hmm, this is good data." Rea narrowed her eyes. "Although the airplane has a special engine that won't bother the monsters and alarm them, we can't do anything if we meet them on the way.

"Without the pillar, there should be something that can attack them or protect this airplane. We're near the coast, so we can slowly descend, but if we're in the middle of nowhere, we're fucked up.

"So, there is a need for a barrier as well as a weapon that can destroy them. Well, what do you think about an air balloon, Teacher?" Rea asked.

"Air balloon?"

"I mean, we have a huge balloon in the sky. They move at the speed of a helicopter, which allows us to fight on top of it."

"But flying above the ocean is problematic."