Programs! Programs! Can't tell a Knight from a Day without a program!
Love that joke. Anyway, Forge World is stepping away from giving you new Tau giant robots to give you an Imperial giant robot. Seems legit. They've started taking orders for their new Cerastus Knight-Atrapos over in their webshop. They're also offering a special, exclusive figure if you order any of their various Knight kits directly from them.
The Cerastus Knight-Atrapos sets itself apart from other Knights because of the weaponry it possesses. Those would be the Atrapos Lascutter, which is useful at both range and in melee, and the Graviton Singularity Cannon (also handy as a trash compactor), which is unstable, but handy for a good time of crunching your enemies into nothingness.
As for the Knight Scion, you will get one of those, for free, when you order a Cerastus Knight-Atrapos, Cerastus Knight-Lancer, Cerastus Knight-Castigator, Cerastus Knight-Acheron, Questoris Knight Magaera, Questoris Knight Styrix, or Chaos Knight directly from the Forge World webshop from now until November 12th.