Chapter 485 - Celebration

At the time he also met many Monsters and after killing them he was able to gather some upgrade points. Using them he levels up his technique. 

Now came back to the main matter,

Tonight he decided to stay inside the Royal palace. Actually he did not know but the king thought that because of his unique spiritual energy, it could also attract attention from those Abyss humans and those Traitors. Even though the king, all those Warriors who previously present inside the Royal palace for today's matter weren't Traitors, he still cannot become sure about them. So this could be really risky for Sam. So, he decided to tell him to stay in the Royal palace. 

The Oni King also told him to protect Sam because he was a special guest of the Oni Kingdom. This was also a reason that the king told him to stay inside the Royal palace. Sam knows that there was a reason behind this but still he was not able to predict the reason.