In conjunction with this Hastur model I've been collecting Shadows of Brimstone Tentacles from Flying Frog Productions. These, thankfully, have been plastic, although again the quality of Games Workshop's miniatures has spoiled me and I've probably butchered them slightly trying to remove mold lines and flashing, and then what's apparently plain old miscasting of the suckers over the top of the tentacles. Given how difficult it is to get miniature Tentacles that can be individually based and used as miniatures in a 28mm game, however, I'm willing to forgive a lot. In fact I'm just glad that I can buy them individually. To these tentacles I've added some bells from the Games Workshop Warhammer Fantasy (AoS now, I suppose) Zombie kit, and some icons from the Games Workshop AoS Chaos Marauders kit that I've used on my Chaos Space Marines. Most of them are also painted up in the colours of my Night Lords as a base (Kantor Blue, Mephiston Red, some sort of Pink for the suckers, Bronze and Gold for metal bits) and the latest to which I've added the command bits (instrument, icon, something as yet undecided to make the champions) are as yet unpainted and unbased. I have a bunch of 32mm bases though, and correct basing is probably important when using 3rd party miniatures like this.
To deal with the enormous crack of the model's rear, I decided that I should go with the imagery that Aaron Dembski-Bowden presented in the Talon of Horus (recommended reading) where the souls that a daemon has consumed try to escape its corpus as it's hammered back into the Warp. Especially since I had lots of zombie-parts left over. I broke some off and reattached them, and will probably fill in the cracks with modelling clay or putty or what-have-you when I get the chance.