Well for starters, Alice here is pretty clearly Looking at Extra Cards. Regardless of the fix we apply to the game, she will be receiving a Warning for LEC.
Now, normally the fix would be to take the extra card (the one stuck underneath, not the top card) and shuffle it into the randomized portion of the deck, then continue the scry. In this case, however, we might not know how much of the deck is randomized. Because Alice has “a dozen assorted lands in play” and the Thassa was played turn 3, she's presumably been scrying with Thassa for a number of turns. If Alice knows the exact number of cards that she's sent to the bottom of the library, that'll make the situation much easier; we would remove that many cards from the bottom of the library, set aside the top card of the library, shuffle the extra card into the remaining portion, then return the removed cards to the bottom and continue the scry with the set-aside top card of the library.
However, if Alice doesn't know how many cards she's sent to the bottom, and neither does her opponent, then we have a trickier situation. My gut reaction is to say that if Alice no longer knows the identity of a card on the bottom of her library, then we should be able to consider it random; in that case, if they can agree that Alice sent
at least X many cards to the bottom, then we could remove that many instead of the whole amount, and apply the fix as usual.
However, that would result in an incorrect gamestate, wherein cards that had previously been in a set position relative to the bottom of the library are now randomized. Alice could gain an advantage here, as she'd be more likely to draw something that she previously scried to the bottom. Additionally, Alice cannot prove that she doesn't know the identity of the cards on the bottom of her library. I believe that because of this, the technically correct answer would be to leave the extra card where it is, rather than attempting a partial fix. That results in Alice gaining information she wouldn't otherwise have, though, which could change her decision on the scry.
In this situation, we would have to weigh which is more disruptive; altering the game state by shuffling previously scried cards into the random portion, or allowing Alice the additional information by leaving the extra card where it is. I would argue that the second option would be significantly more disruptive. Giving Alice information about the next card in her library could strongly influence her decisions for the scry action and for the rest of the turn. With that in mind, I would attempt the first fix; determine how many cards both players can agree were sent to the bottom, then shuffle the extra card into the other portion and continue the scry from there.
Edited Beau (Nov. 6, 2013 08:51:38 AM)