Exhaustion Levels

Additionally, each level of Exhaustion makes you suffer the following:

1. I'm Tired: -1 to Save DC and d20 rolls (stacking), and cannot have Temporary HP.
2. What Was That?: Become Disoriented
3. Wait... For... Me...: Become Staggered
4. Can't Think Straight: Cannot Concentrate, and can only make 1 attack with the Attack Action.
5. Barely Conscious: Automatically fail all saves, and become vulnerable to all damage.
6. On the Verge of Death: immediately fall unconscious and take a Long Rest during which nothing can wake you. You can attempt a DC 20 Constitution Save to wake up for 1 round (still suffering the effects of exhaustion), but doing so fails a Death Save