Thousand Sons Undivided

This symbol cobines the pre-heresy and the post-heresy symbol of the Thousand Sons legion. It signifies the undivided nature of the legion before and after the Horus Heresy.
The Thousand Sons didn't become chaosists, nor did they remain loyal to the Imperium, which, in fact, fell along with the Emperor of Humanity. They remain loyal only to themselves and their faith in the power of knowledge, which, one day, may lead the XV legion to their rebirth.