A Circle of Protection: Greatest is an incredibly powerful mystic safeguard. It has so many different powers and considerations that I will number them: 1. Unlike the other circles, the power remains the same regardless of the size of the circle. The circle can be very, very large (miles). 2. Existing non-magical circles can be used as the Greatest circle. 3. Any other defenses cast on the Greatest Circle is greatly empowered. 4. As far as defenses go, only the greatest gods and forces can break through the barrier, and then at extreme disadvantage and injury. The magical defenses are beyond par. 5. The Greatest Circle also generates incredible forcefield power. Any attacks levelled hit the barriers run through three levels of barrier: a "whisker", which merely causes the attack to disappear, a conventional (though very powerful field), and the final one, which weakens all attacks. 6. The final power is that the Circle is extremely intimidating. All who fight the protectorates of the Circle instinctively know that the caster is incredibly powerful and that they should reckon about losing. This powerful Fear will drive away many in mass armies. Thus, a magician can be sure of incapacitating even the most powerful armies.