I could never truly intend to put Tosca to death.
Even though he indeed annoyed me, killing him would be unnecessary because, from a certain perspective, Tosca merely played the role of a toy, just an object of my amusement. Furthermore, if I really killed him under the guise of a duel, it would leave people with the impression of a Xyrin Empire Leader who's petty and vindictive—an image fine for a small-time gang leader but disgraceful for an Imperial Leader.
Of course, this doesn't mean I was so magnanimous to the point of hypocrisy, so a little punishment was still needed.
After this incident, regardless of Tosca's background, his prospects were utterly ruined; his future likely no better than that of a destitute vagrant whose family was destroyed.
Even if William saved his life, Agna would not let off this fool who almost ruined everything so easily.