Warpstone Flux Rating: ⭐️⭐️⭐️⭐️4/5 stars. The rules are good, and very unique within the entire game which makes them a great choice for what they are able to do. Background. Devoted to their legion and sworn to protect their leaders even unto taking the death blow for their praetors. The companions are the longest serving veterans of the Deathwing and come with a variety of unique upgrades.