How does this work with hourglass? Two of these, a time tower, and an hourglass potentially creates an infinite loop. You play the first ClockWork, play the tower, draw the second ClockWork. On your next turn you play the previously drawn from the hourglass Clockwork to undo the draw putting it back on top of your deck then play the tower you didn't play yet (it was put back in your hand), and then draw from the hourglass to get it back. But that really depends on how they interact.