I've been kitbashing some Black Legionnaires while I wait for The CountdownTM to finish.
They'll need some cleanup work, obviously, but I'm pleased with how they came out. The base models are obviously Mk III Space Marines, with parts taken from the Raptors/Warp Talons kit (mostly the latter, since I used it to build Raptors), Scarab Occult Terminators, Mk IV Space Marines, and AoS Chainrasp Hordes at the end, there.
These models have the official Raptor feet because I thought the Warp Talons' bladed feet looked cooler when I built my Raptors, and it's not like it makes a game difference.
As always, you can click through to see a larger version at Flickr.