Immortality

Your body is immortal. 

You suffer none of the frailty of old age and can't die of old age or be aged magically. Additionally, you can hold your breath indefinitely, and you don't require food or water and can't gain exhaustion points. Also, your body can not be destroyed and you are immune to poison damage and all disease. All physical injuries are healed at the end of your next turn, although hit point damage still remains. Finally, as a bonus action, you may regain hit points equal to 1d6 + your level, although this doesn't heal psychic damage taken.