Ring of Sustenance is a magic ring that grants vitality.
A magic ring that allows the user to go without food, drink and sleep for several days.
- This ring is a common item that is used by outside agents of Nazarick.
- Narberal Gamma sometimes uses this when assuming her adventurer persona Nabe to avoid eating anything poisonous.
- The Homunculus Maids each make use of this item during their shift in assisting Ainz in order to forego problems involving food and sleep.