All-Nighter (5e Feat)
From D&D Wiki
You have found a way to completely render sleep pointless for yourself. You gain the following benefits:
- Increase your Constitution score by 1, to a maximum of 20.
- You do not need to sleep, and magic cannot put you into sleep. You can spend 8 hours of light activity and still gain the benefit of long rest. If you are a race that can benefit from a trance or similarly different sleep cycle, it instead takes the time of your regular "sleep" cycle.
- You do not need to blink, unless your eyes are damaged. You have advantage on saving throws against being blinded.