Your body's chemistry has been manipulated to no longer require sleep.

Instead of sleeping or going into trance during long rests or short rests, you must only wait the given period of time required to fulfill a long rest or short rest to recover spells/hit points or reduce exhaustion points. 

You cannot be put to sleep by biological or magical means. However, actions such as rage or other physical exertion still causes exhaustion. Exhaustion still functions normally for you if incurred by the aforementioned physical exertion. 

Once per five long rests roll a d20. If the result is 11 or greater, take no further action. If the result is 10 or less, take 3 d10 of psychic damage.