Fire is one of the elements of nature and a powerful force of destruction and rebirth. For this reason, fire holds important meaning to the supernatural world. Witches often summon and draw strength from fire and the other elements in spells and rituals.
As a Weakness
Vampires possess a weakness against fire and it can quickly destroy them by reducing them to ashes. Others have long exploited this weakness to fight Vampires when needed. Similarly, the Undead are also vulnerable to fire to a certain extent. Additionally, living supernatural beings can be killed through fire like all living beings.