While designed for a particular game world, the flux horrors can easily be slid into any ongoing campaign using M&M (which is what I intend to do with them). They are a useful set of creatures if you wish to have creatures from beyond to throw at your players and the art for the monsters are very evocative.
Minions of Splintered Serenity: Flux Horrors is a 22-page PDF (19 pages if you remove the cover, OGL page and ad) for the Mutants & Mastermind RPG (3rd ed) written by Stephen Coburn and Nathan Ellsworth and published by Ignitus Innovation. This is part of their supplements for the Untold (Superpowered by M&M) line.
The layout is a predominantly single column, and everything is clear and easy to read. The art is full color throughout and each of the horrors gets its own full color illustration. It looks very slick overall.
Flux Horrors opens with a short introduction to the place of Flux Horrors in the Untold setting. Then it moves to the horrors themselves, detailing eight of them. Ranging from PL 3 to 10, the horrors cover an interesting range of abilities, from the purely physical threats of the Wrecker and the Hydra Strand to the inscrutable motives of the Disciple of Pain and the actions of the Flux Warper and Corrupter both of which spread the influence of the Flux in different ways.
The product ends with a brief outline for using M&M with the Splinter Serenity setting.
Disclosure: As a featured reviewer for RPGNow/DriveThroughRPG, I received my copy of this product for free from the publisher for the purpose of this review.