Ioun Stone of SustenanceLevel 21 Common
This iridescent spindle lessens your need for rest and removes your body's base needs for air and nourishment.
Head Slot 225,000 gp
Property
You do not need to eat, drink, or breathe. In addition, when you take an extended rest, you do so in half the normal time.
Published in Adventurer's Vault, page(s) 144, Mordenkainen's Magnificent Emporium, page(s) 70.