What is he trying to do? I don't think the conditions for the spell to rewind time are met here.
I guess revenge; kill her, swap back to his body, let the prince take the fall for the murder.
I wonder why he's going after her. I mean, she did accuse the saintess too but she wasn't exactly the only one. Even if he suspects she bears a grudge against him for sending Gideon off to fight in the war, and die, it's not like he should know she's actually responsible for the accusation because there were so many parties involved in gathering evidence.
I wonder when the real prince shows up again.