Era: Future

You start the game with four points. Whenever you capture a piece, you gain one point.

At the start of any opponent’s turn, you may pay one point to take back your last move. You may pay one additional point to immediately make a move, interrupting the current player’s turn. If a move is taken back, so are all of its effects (i.e. captured pieces are brought back into the game), and after the interruption, play resumes normally starting with the play clockwise from you.