CS4 Finale - I just finished the sweep of the Courageous and Sutherland. Only missing a sidequest at Hamel entrance because I probably need to do something with Renne in Crossbell first. So Crossbell sweep will be next. Got the Zemurian shard from Rutger in 3-2 so and now Arianrhod's. Oh, and I can't challenge Victor to VM. Hmm. I hope it's just that there's some opponent somewhere in this chapter I haven't beat yet and not that I missed something. Also Musse was pretty fucking hard in Pom Pom Party and still one more left.
Challenging Victor only requires having every VM card, and every past opponent is still available except Cassius (but you can buy his card instead). It's a bit annoying to track down some opponents but you haven't permanently missed that.