Because Hero World was a high-tier world that was released later, it produced the strong profession of heroes and a massive amount of experience. It also provided followers for players, special buildings required by lord players, and various corresponding equipment and skills.
It was one of the more popular high-tier worlds. However, it was not yet open and was still only a mid-tier area, probably due to unstable coordinates. The deployment of players was likely aimed at stabilizing those coordinates, and this surely wasn't the first time players had been sent over.
"I am the King of the Holy Kingdom, and I welcome the arrival of the three heroes on behalf of the kingdom," a fat old man in splendid attire claimed to be the king as he spoke.
They were currently inside a palace, which was resplendent with gold and did not seem at all like it had been invaded by the Demon King.
Clearly, he had probably received more than one group of heroes before.