Sorry if this was asked but does Lich Bane's unique stack with Orianna's passive? They're two different sources so it's not like stacking the same unique item.
I would test it myself but my connection is about as good as dial-up right now :-P

Yes.

Lichbane is actually really silly damage on her since ball has a less than 3s CD and you can just spam it for auto-attack damage. It's the only way you can expect to kill people 1v1 late game.

Sweet, thats what I was thinking but it's good to be sure eh?
Now the only thing is timing the third attack with Lich Bane to get that strong hit...I guess it doesn't matter too much as it's the same damage in the end but it would be a nice surprise to the opponent.