600,000 - 2,000,000 gp.
Third best shield and most likely the best available on most worlds. Shield crafted by mastery of Nightmare Knights order. It will remain extremely rare item for a long time considering how difficult is to obtain it. Provides a permanent red light, if equipped. Since it has same defense value as the Mastermind Shield, it is more often used for decorations, however it's still rare and worth more than Mastermind Shield.
Obtainable in the Dreamer's Challenge Quest after you give 1500 Demonic Essences (Nightmare Knights side).