Dominion: Seaside

Duration cards do what they say now and on subsequent turns as written; leave them in front of you until the Clean-up phase of the last turn in which they do something, placing active Duration cards in a separate row to track them (pages 4, 6).

You do as much as you can from your deck first, then shuffle your discard to form a new deck and finish the action; do not shuffle your discard pile until you actually need to (page 5).

The extra turn from Outpost is a normal turn but your starting hand for it is only 3 cards, and playing Outpost multiple times in one turn still only gives one extra turn (and playing Outpost during an extra turn doesn't give another) (page 9).

Haven: draw, set aside a card face down on the Haven (you must set one aside) and return that card to your hand at the start of your next turn while Haven is discarded in that Clean-up (page 8). Island: when you take an Island you use the Island mat and place the Island and its set-aside card(s) face up on the mat; those cards are not shuffled back into your deck during play and are only returned to your deck at the end of the game for scoring (page 8).

Yes — if you play or modify a Duration card with another card, the other card stays in your play area until it is no longer doing anything, so both cards remain until the Clean-up phase of the final turn they affect (page 4).

You must trash two copies of Treasure Map to gain the Golds; if you play a single Treasure Map alone it trashes and gains nothing, and Throne Room can interact so that the first resolution trashes two and gains Golds while a later resolution might trash remaining copies but gain nothing—see the Treasure Map examples (pages 10–11).