Body of Nebiros

Tio's entire body becomes withered and dry like a mummified corpse. His skin becomes an ashen grey and clings tightly to his skin, his body looses all excess fat, and his eyes become sunken and dark. It does not diminish his physical abilities (besides making him lighter), but does make him look like a literal walking corpse. However since his deathly body requires less sustenance Tio is capable of surviving without food, drink or sleep for three times as long as an average human.

Approval here