someone help I can't kill anyone without the game saying
"with this characters death the thread of prophecy has been severed blah blah blah". I can;t even kill a *bleep*ing dreamer in the middle of nowhere. I first found out that after healing my corprus I killed divayth fyr and message popped up. I finished main quest and all of tribunal and bloodmoon quests (as far as I know). I tried putting vivecs soul into azuras star but message popped up again. for the love of god please someone help me.

You've completed the MQ?

And you get the message anyway?

Just ignore it, it's what I do when I kill Vivec the traitor even if it's before I've completed the MQ, though I'm going to have more restraint now so I can get two Wraithguards and so I can complete the quests he's involved with, I'll only kill him once he's outlived his usefulness.