If werewolves can be wizards why couldn't vampires? Besides according to the harry potter wiki vampires can live up to 200 years away from immortality.
Or what do you mean Voldemort could solve his immortality problem?
Nothing original? Dude, the only bow I ever used from straw hats, was the Arlong bow. You lack a couple of brain cells it seems to be to read.
Besides it is a fanfic after all, why can't I use a bow from the straw hats? Work that brain :D