Plunder has a sub-theme for its Duration cards: next time. Cards that do something the next time a certain thing happens. They just sit around in play turn after turn, waiting for that thing. The thing may immediately happen of course, so that they're discarded that turn. Or it may never happen, and all they do is help out your Swamp Shacks and Tools. Let's see some.
Secluded Shrine is a basic one. Get a Treasure, and you'll get to trash two things. When you're done getting Treasures, Secluded Shrine will quietly leave your deck and just sit there forlornly in play.
Abundance is also simple: get an Action, and you get +$3 and +1 Buy. You can save up for a big turn, or just pop it immediately as a warped Workshop.
Flagship replays your next Action, skipping tricky things like other Flagships.
Landing Party is an exotic one: you have to have a turn that you launch with Treasure, and then all your Landing Partys will topdeck.
Now some landscapes!
Rush lets an Action leap into play; more useful with some Actions than others.
Inherited is a Trait that has you start the game with a particular card (usually replacing an Estate, but it's up to you). Good times.
Hasty makes a particular card leap into play, albeit a turn later. This one is useful on almost anything. A Hasty Territory goes into play but doesn't do anything else for being played; as always there's a rulebook.
Tomorrow: more stuff.