I find it most interesting, that your haven't actually been answered, though some try to snipe here and there around the fringes, without addressing the issue.
Without the ability to parley, without the ability to use trueslays. Without the ability to move with frenzy, other than by flight, you killed Mohrion when he attacked you.
He disfavoured you for it.
If there is nothing more to this situation that we are not aware of to be added by Mohrion, then I can only wish you one thing Agrias.
Many more such disfavours, as apparently they will be a badge of your fighting dominance, over he who dispenses them so cavalierly.
Written by my hand on the 4th of Midwinter, in the year 1057.