The Imperium upped the ante when they turned regular space marines into primaris marines. Well now you can field your own post-human enhanced chaos cultists with the new Daemon-Infused Chaotic Mutant Cultists! What is the power of science, which creates extra tall astartes, next to the power of a warp daemon living in your body?
The cultist who would go on to become Fly Guy was a handsome fellow, who stayed in top physical condition, and who yearned to experience the finer things in life. Not that he could realistically ever expect to have anything decent, let along fine, living in the lowest levels of a filthy hive city working long shifts in the manufactorum. He worked endlessly but he never got paid more than just barely enough to get by. Oh sure, the manufactorum made good profits, but it was never shared with the workers. The shift bosses took their cut of the profits, and the rulers of the house took their cut, and the ship masters that transported the goods off world took their cut, and on and on it when until the High Lords of Terra and the Emperor himself got their own cut. And what was left for the workers who toiled long hours subsisting on corpse starch (or worse) to survive? Absolutely nothing, that's what. You didn't have to be an Imperial scholar educated in the Schola Progenium to realize that this existence promised nothing but a punishing life yet meaningless life and after that to be forgotten completely.
Many workers escaped the factories to join gangs, head to the underhive, become criminals, or to join cults who venerated the Dark Gods. The cultist who would become Fly Guy was by all accounts a promising recruit. Then one day when the legendary Master of Possession Faustus Daemoncaller made a secret visit to the world Fly Guy was one of the first to volunteer to be possessed by a warp daemon. The ritual to summon and bind with a daemon was a terrifying and brutal process. When it was done the daemon that had merged with Fly Guy began to change and reshape its human host's living body. In no time at all three hairy chitinous insect legs sprouted from the cultist's shoulder and his head transformed into that of a giant fly. It didn't take long for Fly Guy to get his nickname after that. He had escaped the prior life and put everything into the service of the Dark Gods, and what did he get for it? A horrible appearance that disturbed even his fellow cultists and as for the finer things in life they seemed out of reach forever. Fly Guy eats by vomiting on his food and then sucking up the partially dissolved food through his tube-like snout. Chaos is funny like that, it promises everything your heart desires, but all too often it delivers the exact opposite.
[UPDATE 23-01-16] I was not satisfied with the scale and proportions of my first four mutants. So I have uploaded a new STL in a more 'Heroic Scale.' The original version has been retained in a sub-folder.
This model wouldn't have been possible without the talent and generosity of these creators:
Head:
A Lovely Fly by Wonglk519
https://cults3d.com/en/3d-model/art/a-lovely-fly
Torso:
Practice Mannequins by Bella Nacht Miniatures
https://cults3d.com/en/3d-model/art/practice-mannequins
Left Arm:
Beefy Armed Alien Bio Blaster by Hairy Hobbies
https://cults3d.com/en/3d-model/art/beefy-armed-alien-bio-blaster
Left Hand:
Bigby's Hand or Mage Hand by Animikeart
https://cults3d.com/en/3d-model/game/bigby-s-hand-or-mage-hand
Fly Legs (on right shoulder):
Mutated Fly by Schlossbauer
https://cults3d.com/en/3d-model/game/mutated-fly
Holster & Pouches:
Euclidean Infinite Number Soldier Builder by TabletopMando
https://cults3d.com/en/3d-model/game/euclidean-infinite-number-soldier-builder
Legs:
Black Cloaks Dread Elves by AM-Loricen
https://cults3d.com/en/3d-model/game/black-cloaks-dreadelves
Boots:
Makies Industrial Boots by Makies
https://cults3d.com/en/3d-model/game/makies-industrial-boots