I'm dming a campaign and my players are headed to a cursed town to find some emissaries from their secret organization. the town is cursed with a sort of reverse groundhog day stuff. every night every resident/building/etc ages 2 years. my players need to find the cause of the curse and cure it before everyone in the town dies of old age. my problem is; i dont know what the cause is yet. i have no idea where to start, can you help me out?