File:Champions of Light and Heralds of Chaos Warhammer 40k Majestic Chicken.jpeg

The 'source attribution' for this particular image is actually quite unique. It is actually a composite of multiple, separate first party images that were made by Games Workshop. However, the deviantartist known as MajesticChicken 'composite-ized' them by arranging them in a row, and also 'colored them in' from their original black and white state. Given its first party origins, it likely fits within the automatic greenlight purview of the wiki's inclusion guidelines. It should also be mentioned that this image might be suitable for representing Warhammer 40k in general, for those occasions when it's necessary to do so.