We all know the cursed magic stone have a loli inside and he will get a power up without any repercussions. Or, there's some repercussions, but it will be solved in one or two chapter.
Or to be more cliche, that cursed stone will be the weapon for the vampire, like it seal a ultimate master vampire and how the evil vampire attack won't work.
Finally an update. Really thank you for translating this and please continue translating it I really love this manga and it has a great and interesting plot/storyline. Thank you translators. RESPECT!