Last week during a PPTQ I head-judged, I noticed a player, when resolving Attune with Aether, after finding the land in his library but before shuffling, he put the land on the table and begin rearranging some of his remaining lands in his library.
The reason is obvious, he wanted his lands to be positioned evenly throughout his library, so after shuffling, the chance those lands still stayed evenly would be better.
The main issue here is that I think players are not allowed to manipulate the order of his library. So I stepped in and issue a GRV-warning for his behavior.
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My reasoning for this ruling are:
1. As in CR401.2:
Players can’t look at or change the order of cards in a library.
and search effects only give player privilige to look at his library, he still is not allowed to change the order of it. And also in official notes for Panglacial Wurm:
While searching your library, you must keep your library in the same order until you shuffle it. This order could matter if you tap Millikin for mana, for example, to pay for a Panglacial Wurm you cast from your library.
Thus I think players are not allowed to manipulate the order of his library during searching actions, So the player violated a game rule and a GRV infraction is needed.
2. I've noticed these kind of actions taken by players in the past. In the case I mentioned in this thread, I believed that player was not trying to manaweaving or cheating in other ways, and he thought this is allowed (if it's illegal). However, if players are allowed to do this, I can imagine more cases of abusing (like manaweaving) would surface. So this issue should be addressed.
Those are my thought on this case. And after discussing with fellow judges in my region, most (yes, most, that's a warning signal you can't ignore right?) of them think I give the ruling wrong. Either too harsh on give a GRV-warning and should just educate the player, or should consider other kind of infractions like Slow Play or Insufficient Shuffling if the situation gets worrying.
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TL;DR : I would like to have an “O” answer on this situation if it's appropriate. Is player manipulating his library when performing searching actions a GRV infraction?
Please excuse me with my English, thank you.