From what I understand i think they sent people to attack him to get a messy reaction from him like which can get him or people associated with him in trouble, but halt was able to take care of it it a better way? And ended up hurting the one that were send? So his majesty says next time make sure no trace of imperial family is left while we see a scene of blood dripping sword of the guards who were hurt by halt. This is just what I assumed, im not sure if thats whats happening
The chapters was confusing but did halt die...? No, right? He better be safe or else..