Time Machine
Action, $5
Set aside this and a card from your hand. That card doesn't count toward your deck for scoring at the end of the game. At the beginning of the next game of dominion you play, shuffle that card into your starting deck.
Another Time Machine
Action, $5
Set aside this and a card from your hand. That card doesn't count toward your deck for scoring at the end of the game.
Setup: At the start of any game, you may shuffle any number of additional cards into your starting deck. If you do, you must set a copy of each card added this way aside with Another Time Machine in the next game of dominion that you play. If you don't, destroy the universe.