บท 453: Destruction of Demon King’s Castle (2)

"Gosh, they've made very annoying stuff!" Grace said in an annoyed voice.

Gangsok didn't respond, but he was also surprised.

'I've never seen such a technology before.'

While playing the game several times, he has never seen 'magic engineering' make as much progress as this one.

'Did I leave him alone for too long? He's made all sorts of weird stuff.'

Obviously, the magic engineer needed lots of factors to be able to make such stuff.

For example, they needed the power to create a huge infrastructure by combining their skills, manpower, capital, buffs, etc., and all other factors.

'I knew that he had been investing a lot, but I didn't know that he made such a huge investment like this. Was I too complacent?'

At that moment, he turned his head and looked at the castle.

"..."

His eyebrows twitched. He felt something strange.

"Demon King, what's wrong with you?"

"He's faster than I thought."

"Pardon? Then he…"