However, those countries and large merchant guilds can still afford it, deploying their own communication devices everywhere without any problem.
This is also the reason why those countries and large guilds are extremely well-informed. Even though the Tukan Nomads Army is thousands of kilometers away from the Felen Continent, King Yasan has already received accurate information.
The reason why the Conqueror Guild's instant communication network, established using Ghost Messengers, only has an advantage over small to medium-sized guilds and not over large guilds is because they also have their own instant communication networks.
Gaven is limited by his knowledge of spells and hasn't fully grasped the world of spellcasters in Felen; he's underestimated many things in this world.