Astral vampires are vampire spirits or thought forms.
Sorcerers can create astral vampires through magical ceremonies and recently deceased bodies.
Physic vampirism during life, leaving the body and entering the astral plane can also create an astral vampire. It exists within the plane leaving nightly to feed upon human blood.
You will know someone has been suffering from an attack by weakness and fatigue.
Mari Wells 
It’s amazing what we don’t know – I’d never heard of Astral Vampires before 🙂
😀 There are so many types of Vampires, it makes them scarier!
I always look forward to your posts about creatures of the night and other “friends.” I’ve come to expect the unexpected here! Thanks you for all of your research and clear clean writing. Always a treat.
Thank you, Juliette. Can I email you about a vampire feature month I want to do? I love your blog and would love you to be a part of it. 😀
Yes, please do tell me more. Send me a note.