Blood
From immemorial times, blood has had great significance, ritually and esoterically. It has been used to imitate rain in rain-making ceremonies; smeared on the wood-work of houses to appease the tree spirits; used by magicians for evil purposes and so on. Religious fundamentalists such as Jehovah’s Witnesses forbid the “eating of blood” and its use for ritualistic purposes is frequently described in the Christian Holy Bible.