Originally posted by WildBantha88
Only a severely weakened son could be killed. His sister and father were dead. Full power son is immortal
Anyway, the only practical way to kill one of the Mortians without the dagger is to go beyond Shadows. And even then, it's all but an impossible feat.
Regardless, the ones can't be killed by someone like Kenobi or Anakin even with dagger. Dagger served as a plot device. Otherwise it would be impossible for Son to accidentally kill Daughter and Father commit suicide.