Its long, jet-black dyed hair is swept across one eye in an emo fringe, it wears hobnail boots and it keeps getting sent home from school for setting fire to the desks.

Star Wars has hyperspace, Star Trek has its warp drive (or, in Discovery’s case, travel via the mushroom dimension), Battlestar Galactica has her headache-inducing jump drives, and The Hitchhiker’s Guide to the Galaxy, of course, trumped the lot with its infinite improbability drive. Every great science fiction universe has its own jargon-cloaked, fantastical method of bending physics’ laws to travel faster than light across the vastness of space. To create a guide to Warhammer 40k Chaos factions, we must start at the beginning, with the Warp.