Shades of Darkness

It seems you don't have to kill Vittorio. Or you can just sit in the castle, click around for about three months, build up an army, and go for it.

I didn't touch him; I came out of the dungeon, cleared the path to the road in two days, and this monster runs out of the garrison, I go to the castle, and he follows me, but luckily, I have a save before the mentor, so I'll try a different tactic...)