The nearby kingdom couldn't send another spy either since Vampires can differentiate their kind easily. The moment they find other races enter their border, they will kill them mercilessly.
This makes the other kingdom suspicious of the Eternal Kingdom, especially the one that hates them. Some kingdoms are also trying to spread nasty rumors and controversial theories about the Eternal Kingdom.
However, no one is moving against them since most of the nearby strong kingdoms are still in a recovery state from the Krugguar Emperor migration. Many tried to bring up this matter to the world alliance, but the elf leaders ignored it since this matter didn't affect the whole world.
The world alliance only holds a meeting when there is a threat that could affect the entire world, like the migration of a monster overlord or newborn monster overlord. Otherwise, they will not care even if a kingdom destroys each other.