The problem with the fixes many are discussing here are that they are applying the fix for HCE to a GPE-GRV. If we are assessing the penalty for a GRV, we only have the fixes available to us to that are of a GRV though the HCE fix would SEEM to apply here more appropriately.
Personally, I would like to apply the HCE fix, but the root cause is a GRV, so we have to apply one of the GRV partial fixes to the situation, which none of them cover. We can't “back up” through the activation either since there were cards in a particular order, which we don't know.
From the IPG on Shuffling:
“A card that became legally known to a player after the error was committed is not considered random and is returned to the appropriate location after the shuffle has been completed.”
The manipulation completed after top activation should not be undone since we don't know the order of the cards and are not random as stated in the IPG.
All we can do is assess a warning for that player at this point.
Edit:
This is very similar to doing something like Brainstorming with a green mana. Again from the IPG on HCE:
“Be careful not to apply this infraction in situations where a publicly-correctable error subsequently leads to an uncorrectable situation such as a Brainstorm cast using green mana. In these situations, the infraction is based on that root cause.”
This is the situation we have here. A publicly correctable error (using Top with a Stony Silence) lead to an uncorrectable situation (rearranging the top 3 cards). We need to base the infraction on the ROOT CAUSE and not the subsequent issues. Top's ability was legally carried out. The issue is that it should not have been activated.
Edited Samuel Polio (June 9, 2016 12:24:06 AM)