Pact work, agreement with a spirit in exchange for aid, runs through the grimoire tradition and into modern demonolatry and Left Hand Path practice. The Book of Abramelin, a famous text of ceremonial magick, describes a sacred oil used to consecrate the magician and the tools of the work. Practitioners use pact and Abramelin-style oils to anoint candles, seals and parchment before an invocation, and to mark themselves as prepared. Many keep a separate bottle reserved for one spirit alone.
