Modern Masters Weekend: Judge Race!

Kevin Moore and Matteo Callegari battle in a deck-check race at Grand Prix Utrecht!

[SkepticalAaron]

Nothing like a video published by Wizards in which they get the rules wrong. Marked cards is a warning, not "a game loss-at least". Game losses are only given if the head judge believes they are marked in such a way that a player could know it and gain an advantage.

[Whatmor]

So the error was? But this type of video should be made again :)