A new set means new updates to the MTR and IPG. View the changes here: http://blogs.magicjudges.org/telliott/2016/01/18/ogw-policy-changes/
Here’s the important paragraphs:
Ladies and gentlemen, I give you Hidden Card Error.
Hidden Card Error doesn’t represent a lot of technical change. Most of your rulings will produce the same result as they have these last few months. But it does represent a large cleanup. Drawing Extra Cards, Failure to Reveal and Improper Drawing at Start of Game have all been merged. Oh, and we threw in the morph fix as a bonus.
So, you get into a situation where a player has made an error that can’t be fixed with public information. You remedy them by revealing all the information the opponent needs and letting the opponent make the choices on how to fix it. Didn’t reveal that card from Domri Rade? Opponent looks at your hand and removes a card. Scried two instead of one? Opponent looks at those two, removes one and you scry the other. Draw seven off a mulligan? I think you can see where this is going. Shuffle your hand into your library… hey, wait, that works too.
Essentially, the Drawing Extra Cards rule has been extrapolated to apply to situations that can’t with public information. What do you think about the changes?