The Betrayer

Oh! Also, since Sethos use to be a Jedi, Halana Ysanna, Sasha's mom and Lyna's grandmother, trained with Sethos before. She always expected the Dark Side in him. And when they were young adults, they use to duel each other a lot.

So once Sethos and his fleet comes to Ossus, and a battle starts between the Sith and the Ysanna tribe with their Jedi allies, could he and Halana duel each other? If you're cool with that.