The Latin meaning for "Great Work". Usually meaning the greatest, most popular, pinnacle, or most renowned achievement of an artist, artist or composer. Or a "masterpiece"
Person 1: I will beat you with my Excalibur!
Person 2: Your penis is no match for my Magnum Opus!
By Lorianne
Magnum Opus
The Magnum Opus is the highest working in Spiritual Satanism, and the end result of all legitimate occult disciplines, the allegories and the legends of the Gods.
The Magnum Opus is physical and spiritual perfection and immortality.