Okay another one I thought of, with a simple puzzle.
All cards are in the supply. Pick 5 cards out of them and put them in your hand (nothing else is in your deck). Now end the game with a three (or more)-pile.
King's Court, King's Court, Bridge, Ironworks, Smithy
Okay, so you King a King, letting you play three Bridges; Ironworks gains you three cards, and a Kinged Smithy draws you those three cards. It wasn't totally obvious to me what three cards work: you can't get back into the KC+KC territory you started in with just three cards.
So, in case anyone else is reading this and not immediately seeing the answer: you don't need to KC+KC anymore, because the Bridge was only needed once, to reduce KC to cost 4. The three cards are KC, Ironworks, Smithy; you King the Ironworks, gaining the same three cards, and draw them with Smithy.