Unironically everything that's been revealed after the Fairy feels like it came out of nowhere and has no relation whatsoever to anything that came before.
First off, how does he even still have "The Blood of Felt" or whatever his stupid name was? He died and was resurrected as a Bloodless Skeleton, then became a Ghoul which also looks bloodless, and his ascension to vampire was caused by him getting blood from the Vampire Girl. What was she also just coincidentally and conveniently a descendant of this stupid King?
Even if he does still have the Super Special Awesome Amazing Omega Blood where the fuck was all this amazing blood at every other point in his life, in the life of the girl? What they couldn't use their amazing powers to stop a single big wolf? The dialogue in this chapter clearly indicates that both their parents knew about all of this, so what did they just not use this by choice? Just felt like dying and letting their daughter die too?
Plus it fucks with the entire theme of the story which is about a no-luck nobody getting a single shot of power and using his impressive knowledge to grow and improve. GUESS HE WAS AMAZING ALL ALONG and all his previous failures weren't him hitting the natural limits of Humanity and not being able to push past them it was just because he was the weakest Divine Heir ever. Guess he was actually Pathetic. It's just fucking Naruto all over again.
Not to mention this has completely stopped all of the other plotlines we had set up. What's going on with the Dragon? Guess we'll wait. How did he Resurrect? They haven't even taken the opportunity to connect his bloodline to that despite it being the obvious resolution to that question now. Elf Girl in the Dungeon? Who? His relationship with Lorraine? Meh. Vampire Loli? Guess Not. Swordswoman? Who cares. Now we've gotta info-dump the history of an ancient civilization no one heard of before this point and no one cares about at all.
This Arc has singlehandedly taken this Manga from a ~7-8 down to a 3-4.
That's almost Impressively Terrible.