If you Procession a Duration card, the Duration card is out of play, but its effects remain, but they are not doubled. For example, if I Procession a Wharf, first I draw 2 cards and add +1 Buy to my "Buy bank." Then I draw 2 more cards and add +1 Buy to my "Buy bank" (for a total of +2 Buys, or 3 Buys). Then I trash the Wharf and gain an Action card costing 6 - say, for example, an Artisan - onto my discard pile. I then make between 0 and 3 Buys with whatever Treasure I have, and in Clean-Up, I discard the Procession and the Treasure cards. Then at the start of my next turn, in what I guess you'd call my "zeroeth Action," as it were, because it happens during my Action phase but does not cost me an Action, I draw 2 cards and add +1 Buy to my "Buy bank," for a total of 2 Buys. The Wharf's effects now being gone, it has been completely resolved, and I don't draw 2 more cards and get another +1 Buy, nor do I start the turn after that with +2 Cards and +1 Buy as my "zeroeth Action." Correct?
Not correct. When you Procession Wharf, you play Wharf twice. So you do this:
(First play)
1) Draw 2 cards and get +1 buy
2) Start of next turn draw 2 cards and get +1 buy
(Second play)
3) Draw another 2 cards and get another +1 buy
4) Start of next turn, draw another 2 cards and get another +1 buy.
So at the start of next turn, you will draw a total of 4 cards and get +2 buys. There is no difference in effects between playing 2 separate Wharfs, and playing the same Wharf twice, whether using Procession or Throne Room to do so.
The important thing here is that the Wharf doesn't need to be in play to do anything next turn. You played it twice, so you get all of its effects twice, both this turn and next.
Assuming that first question is correct that remains true even if another player has - between the end of my last turn and the start of the next, taken that Wharf out of the Trash by playing, say a Graverobber. Right?
Right, it doesn't matter at all what happens to the actual physical card after you play it. Makes no difference if it is in the trash, in play, or in your opponent's library or in their play area.
So if I play a Counterfeit, and I play subsequent Treasure cards one-by-one, let's say I play a Counterfeit and then a Gold. Do I announce the Gold is the one I'm playing twice and then immediately trash it to take it out of play, but still have the 6 Coins it confers? (I ask for in the future, when I get Prosperity and may wish to do this with a Counterfeit on a Copper to buy a Grand Market, for instance.)
To be technical, you don't just "announce" Gold in any way, you simply play it, twice, then trash it. Each time you play the Gold, you will get +
, so it will give you a total of +
, in addition to the
from Counterfeit. Just like with the action cards and Procession, it doesn't matter what happens to the Treasure cards after they are played. They give you
when you play them, and you still have that
whether the Treasure stays in play, or gets trashed, or gets moved to the top of your deck with
Mandarin.
On that note, if I play a Counterfeit on a Spoils, is it just like my above question, except after that, I put the Spoils back on the Spoils pile? Or does it stay in the Trash? (I ask because that matters for something like, say, Forager.)
Spoils will not ever go to the trash in this case. You always do everything in the order it is written..
1. Play Counterfeit, which tells you to play a treasure twice.
2. Play Spoils. Get
, and return Spoils to the Spoils pile.
3. Play Spoils. Get
, and try but fail to return the Spoils to the Spoils pile, because it has already been moved there.
4. Try and fail to trash the Spoils, because it has been moved, so the Counterfeit cannot "find" it to trash it. This is called the Lose-Track rule.
The last question implies that you are missing the important fact that you must do everything written on the cards
in order. So when Counterfeit tells you to play a Treasure card, you play that Treasure card, doing everything it says fully, before you ever get back to Counterfeit's "trash that Treasure". Spoil's "Return this to the Spoils pile" happens first.