The webs he creates are actually machine constructed rather than biologically. Unrelated, you possess Vampire Physiology User with this ability either is or can transform into an vampire, a being who subsists by feeding on the life essence of living creatures (often in the form of blood), regardless of whether the vampire is undead or a living person/being. While all vampires need some form of life-essence, the quality and quantity vary greatly: from daily to rarely, from needing lethal amounts to barely notable, from sentient blood freshly drained to rare steak. Physically vampires are similar to their non-vampiric species, but exact changes their state causes vary greatly: more common effects include pale/white skin, glowing eyes (possibly chancing to golden or red), prominent canines or generally predatory appearance, but some have no visible changes at all, while others barely pass for a humanoid. Mentally vampires vary from perfectly normal persons with unusual dietary requirements to predatory, calculating beings, to hunger-driven blood-junkies. Generally vampires are physically imposing beings with excellent strength, speed, endurance and agility, excellent senses, extended living-span nearing ageless and high-level resistance to damage. Other abilities include ability to turn other beings into vampires (possibly involuntarily), mental abilities, transformation into animals or mist, etc. Note that vampires are able to learn Magic, so the variety of powers some have isn't so much result of them being vampires as their own studies.