As it turned out, a few years ago, several low-level demon beasts had attacked some of the human cities.
These attacks were primarily carried out by Level 1 demon beasts, with occasional appearances of Level 2 ones.
However, there were no sightings of Level 3 demon beasts or Level 4 Demon Kings.
Despite this, these attacks had still caused some casualties among the human population.
Similar incidents had occurred three or four times so far.
Jiang Chengxuan quickly formed a hypothesis in his mind.
It seemed that over the past century, the Demon Race had grown restless and was using these attacks to probe for certain weaknesses.
The repeated nature of these incidents suggested that they might have discovered something valuable from their probing.
Otherwise, similar incidents wouldn't have happened three or four times in a row.
However, this was clearly not what Jiang Chengxuan paid the most attention to.