I am trying and testing modded ways to kill a vampire.
For now I came up with hese two modded objects.
You will find them in Appliances>Refrigerator
Vampires will drink from them autonomously when thirsty.
Blood Pack - Poisoned:
Will drain Vampiric Power completly, but it is not deadly.
Blood Pack - Deadly:
This one will kill a vampire after consumption.
Vampire will burst into flames. Death from the Sun.
You can have both objects at once :)