A Chromatic Phantom born from an amalgamation of souls attuned to madness and anarchy, from which it obtains the color purple. The odd behavior of the Phantom's constituent souls causes it to become wholly amorphous save for the screaming faces of the strongest-willed spirits adorning its ectoplasmic tendrils.
The souls forming a Mad Phantom operate in an antithetical fashion to those within a normal phantom; they repel one another, rather than attract, and when they attempt to possess a creature, parts of the spirits composing these ghastly undead force their way into the host's mind instead of absorbing their target's consciousness into their own. The personality of the injected spirit can partially override the mentality of the host, causing temporary yet drastic changes in their mindset and alignment.
A Mad Phantom sows chaos on the battlefield, causing victims it touches to lose their minds, temporarily sever the bonds of divine casters to the powers that be, and in some cases, cause those who stand against them to switch bodies altogether.