You guys are not understanding what I am saying.
I think you're not understanding that explaining how Dracula would suddenly be able to corrupt or destroy an object of God--the very thing that's immune to his influence and weakness him--would be fairly complicated, and can't just happen because it's a "cool" plot device.
But just to humor the idea,
if Dracula had the ability to mend something as powerful as the Vampire Killer for his own hands, what would be keeping him from just jumping over the Belmont roadblock entirely and destroying the Church head-on with its own weapons?