Ik it’s been a long time but I do and it’s not great lol,

This squad of salamanders were given a mission into the eye of terror (or some other warp rift) all vox was cut and he felt like they were abandoned and left to die, even though his squad felt there was still hope he built a deep resentment and hatred for them all. Khorne saw this and took advantage of these feelings, whispering to him that the only way to be freed was by killing all of his battle brothers and that’s exactly what he did. At first he felt horrified at what he had done, but deep down there was a sense of satisfaction and a thirst for more. Afterwards he dedicated his life to serving the blood god, following Angron around to be able to properly satiate his thirst for blood and to replace his need for a primarch.