Before reading other responses:
There's a couple of problems, here. Anna played a land card at a time she couldn't - either she played a land during her upkeep, then drew, or she missed her draw step, then played a land. Then, she didn't reveal the top card of her library before continuing. Then, she resolved her trigger at an incorrect time (after having already passed the point where it should have resolved). Portions of this could be considered Out of Order Sequencing. However, these actions did not end up at the same result state as they would if they were completed in the correct order, so it's not Out of Order Sequencing.
On their own, playing a land at the wrong time is a GRV with a Warning, (or, alternatively, drawing a card when nothing tells you to is DEC), failing to reveal is a GRV with a Warning, and resolving a trigger that no longer exists would also be a GRV with a Warning. Does Anna actually get all these warnings, though?
The very first point of error is playing a land from the top of library, without having drawn a card first. This is a GRV, and it means that whatever comes next is not DEC. Then we have an error for not revealing, and resolving a trigger at an incorrect time. We apply the most severe infraction & penalty here - Game Rule Violation with a Warning for Anna.
It sounds like Anna made all these actions in quick succession, as a single block of actions. If this is the case, Nicole has not done anything wrong. No Infraction. Ask anna how many GRV's she's had so far.
Now, for the fix. The game hasn't advanced too far, and few decisions have been made, so I'd probably be comfortable authorizing a backup. Remove 1 life from anna's life total, return a random card from her hand to top of library, return the played land from the battlefield to the top of her library. It is now Anna's upkeep. Give a time extension as appropriate, remind Anna to be careful, and continue play.
After reading other responses.
I hadn't considered whether we should treat failing to reveal and playing a land at the incorrect time as separate infractions, and Warn for both. They don't have the same root cause per se, but they were both part of the same block of hastily taken actions. This would indicate that we should treat the problems separately. On the other hand, the severity of the courser's problem is only because a land was incorrectly played - had Anna drawn for turn, then played a land before revealing, we'd have a technically incorrect game state, but one that was essentially undamaged (because there were no unrevealed cards going in to Anna's hand), with a very simple fix. (no rewind required, just no partial fix required, just continue the game and reveal the top card of library per rules.) This encourages me to consider the two problems as related.
I'm interested to see discussion on this point.
Edited Talin Salway (Feb. 26, 2015 02:40:21 PM)