Arise Cult Ilithnid!
Here's a conversion I made last week. It's an updating on the old Genestealer hybrid/Magus idea. I've gone for a creepier look which I'm pretty pleased with. He'll probably count as a Magus in the campaign, possibly from a new cult drawn from a nearby world?
The body is a Forge World Rogue Psyker and the head is from a Genestealer. The flesh is a 50/50 mix of Citadel Asurmen Blue and Leviathon Purple wash, over a Dheneb Stone basecoat. The hybrid harem behind him consists of Heresy Miniatures Succubus miniatures.