I have a feeling that the mastermind of these assassinations might have also experienced rebirth so he and his faction is doing everything they need to kill Long Xiaoyuan. It won’t even matter if he heard that the relationship between LXY and SQZ is really great now.
It could be that their main goal is to see Shi Qinzhou seated at the dragon throne and be formally crowned as Son of Heaven… Hmmm🤔