That was an awesome chapter !
Spoiler:
Saotome is really powerful and seems to be in the same side than Oga and Hilda ! However, he's just in another league
Roytal seal ? Does it mean that he's the man who make a contract whith Beel father, Beelzebub ? Hilda, a non-contracted nurse ? So, she's a noob
Maybe we will see a norito with Oga
....
Beelzebub FTW