Phantasmagoria

Phantasmagoria is an obscenely powerful device, of a suitable tier to a weapon of mass destruction given enough mana, that forces a high level illusion spell on everyone within a certain range based on how much mana is put into the device. It makes all their senses detect what isn't real, and ignore the true dangers lurking behind the illusion. Only the wielder during the activation, automatons and those incapable of higher level discernment of thought, those with insane willpower, or those with anti-magic devices are immune from the activation of the effect. The effect will last as long as the core has mana to funnel into illusions and this will vary based on the range of the cast and the intensity of the deception.
This device was once stolen from the Empire and used by the cultists who at one point inhabited what is now known as Glory, there is became a worshiped treasure of Aradia despite being the brain child of one of Narn's Apprentices. As of 1086, the device is safely held by Divankul Dul-Sansiska within his laboratory in Volia's Grace.