This option will probably not work in gavelkind succession, since they prevent you from actively meddling with the succession too much this way. If everything goes well, this will start a succession war once you die. Give your preferred son a whole load of powerful duchies.If he gets imprisoned, you could either refuse to ransom him out (in my experience, prisoners often die in custody) or bail him out and send him on more suicide missions. Throw him against far superiour forces, and hope he gets himself killed. Make him lead an army of only a handful of men, preferably not a very skilled troupe.Having your son excommunicated first will eliminate some of the penalties. You will get severe penalties to the opinion of vassals and loseĪ bunch of piety, but you will be certain it will work. Imprison and execute your son, even if you have no moral right to do If your king is old, frail and likely to die soon, you could still.It's possible, but there are no guarantees for success.
You could execute him, but I've found it to be an unpreferable choice due to the penalties (-10 Opinion from all vassals, -20 Piety). Even if you could imprison and even banish your son, he would still be your heir.
