[战锤40K] 审判庭 VS 星爪战团(Play On Tabletop)

https://www.youtube.com/watch?v=HY_6eBoUjo4 The Astral Claws earlier this season waged battle against a battalion of Astra Militarum and loyalties were questioned then. Are they really Ultramarine successors? What is their connection to the Red Corsairs?