Stilled Hungers
Food, drink, and maladies of the flesh have lost their hold over you, but these are the very things that keep a soul vital while in the land of the living. Your mind grows ravenous absent those urges—your thoughts crack with gnawing fears, and your dreams wither into crooked nightmares.
Sated Cravings.
Forgoing food and drink doesn't give you Exhaustion levels. You have Resistance to Poison damage, and you have Advantage on saving throws to avoid or end the Poisoned condition.
Tenuous Psyche.
You have Vulnerability to Psychic damage and Disadvantage on saving throws to avoid or end the Frightened condition. A Calm Emotions spell cast on you suppresses this feature for its duration.