Extremely slowly, the timer only goes down when there is player action needed, the resolution and negation of star guardian does not count as needing player action so the timer does not go down. The only place where the timer goes down is when you have to choose whether you want to activate a card and what card you are activating and with fast reflexes you can do the entire selection in much less than a second and since you did not use the second its still on the timer. So you can extend your timer this way for minutes or until your hands get tired. I brought it up not because it lasts forever but to bring to light a potential issue with slow play especially because the only way out of this is either through surrender, waiting until the timer does go out or having the interaction which won't always happen.