Satchel of the Void View Details
Type: Support Faction: Silver Twilight
Cost: 2
Item.
Action: Pay X and exhaust Satchel of the Void to shuffle X cards from your discard pile into your deck.
The question arose today... Can you pay 0 just to shuffle your deck?
The two arguments were:
1) You're shuffling 0 in, so there's nothing to do.
2) It doesn't matter that X is 0, you still shuffle 0 in, and thereby shuffle.
This is tangentially related to card effects that are "Search your deck for <something>" which would cause you to have to shuffle your deck afterwards. Can you use this effect if you know for a fact that you have no cards that would match the search?