Well then I have my strategy to ensure that this is never a problem for me.Darthsaber: I don't think that's illegal because it's intrinsically unmarked. I have opponents shuffle my deck like that all the time, and the worst it is is annoying. I'm pretty sure a judge would stop the game, fix the cards and continue.
On a different not: Is it bad if I opened a commander box just to take out [card]Nevinyrral's disk[/card] and toxic deluge?
I really don't give a shit about most of the deck, I just wanted the aforementioned mass removal and [card]kongming, "sleeping dragon".[/card].