Blessing of the Chrono Prince

You place the hourglass down at a point within range, expediting the resting process. All creatures who remain within 15 feet of the hourglass only need half as much rest as they normally would. (A short rest only takes 30 minutes, a long rest takes 4 hours, and elves trance for 2 hours). 

If a creature leaves the area, the spell no longer has any effect on them, even if they re-enter the area. (If a creature rests for 2 hours within the spell and then leaves, they only need 4 more hours to complete their long rest.

You can only cast this spell once every 24 hours.

 If you cast this spell once a day for a year, the effect becomes permanent.