How to turn into a vampire?
I don’t think there are any chants that can help with that. I think being a vampire is like a lifestyle choice. So you really don’t need to do anything more than start doing the things you think vampires would do. Sleep during the day, bite people or animals for blood, and find other vampires to become friends with. It’s pretty simple.
No chants, no spell, no biting-and-turning. If you were not born a vampire, you will not turn into one. If you want to be a role-player, though, that’s easy. “Bats and fangs and dark of night, Give to me a vampire’s bite. No more will I face the Sun, Light and brightness I will shun. Let me be a Vampire true, Edward Cullen, I LOVE YOU!” That should do it, lol!