You're allowed to choose 1 of 3 time related powers, which one are you choosing?
A time power salesman offers you to choose 1 of 3 time powers in exchange for 1 second of your lifespan. You can only choose only 1 of the 3 time powers to have.
Time Reversal - You can reverse time back up to a maximum of 1 hour. The cooldown scales to how much you reversed time so if you reversed time for 15 minutes then you have to wait 15 minutes to reverse time again.
Time Stop - You basically have Dio's time stop but longer. You can stop time for up to a maximum of 1 hour and it's cooldown also scales to how much you stopped time similar to Time Reversal.
Future foresight - You can see up to 5 hours into the future. Has no cooldown.