Warpstone Flux Rating: ⭐️⭐️⭐️⭐️4.5/5 stars, rounded down. The rules are really rather good, and some of the best in the game in my (biased) opinion. Your mileage (and builds) may vary. Background.The Dark Angels are the First Legion and hold a lot of the organization of the initial formations over compared to other legions. Horus saw to it that they were well out of the way when the Heresy began.