To put it simply, Hudson's archenemy, that vampire, once used a special method to travel to the Five Great Seas and committed sins, coincidentally including the murder of Hudson's mother and younger sister when he was young.
Because of this, Hudson embarked on the path of an exorcist.
This is also why he is determined to go to the Blood Sea.
As for how dangerous the Blood Sea is, there's really no need to elaborate; a special being like Hudson would certainly be savored by those formidable vampires...
"Wait for a while."
"Once I've finished what I'm working on, I'll make a trip back to the Five Great Seas, and then I'll drop by the Blood Sea."
Rogel said.
If Hudson insists on courting death, Rogel wouldn't forcibly stop him, but since the Five Great Seas are near the Blood Sea, lending a hand wouldn't be a problem.
Coincidentally, he could also see the sights of the Blood Sea.
