Death holds no sway over your patron, who has unlocked the secrets of everlasting life, although such a prize—like all power—comes at a price. Once mortal, the Undying has seen mortal lifetimes pass like the seasons, like the flicker of endless days and nights. It has the secrets of the ages to share, secrets of life and death. Beings of this sort include Vecna, Lord of the Hand and the Eye; the dread Iuz; the lich-queen Vol; the Undying Court of Aerenal; Vlaakith, lich-queen of the githyanki; and the deathless wizard Fistandantalus. In the Realms, Undying patrons include Larloch the Shadow King, legendary master of Warlock's Crypt, and Gilgeam, the God-King of Unther.

Expanded Spell List

The Undying lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Undying Expanded Spells

Blessing of the Dead

Starting at 1st level, you learn the spare the dying cantrip and either the chill touch or toll the dead cantrip, which count as a warlock cantrips for you. Spare the dying restores a creature to 1 hit point at the start of their next turn, you can cast chill touch as a bonus action, and toll the dead always does 1d12 necrotic damage. You also have advantage on saving throws against any disease.

Additionally, undead have difficulty harming you. If an undead targets you directly with an attack or a harmful spell, that creature must make a Wisdom saving throw against your spell save DC (an undead needn't make the save when it includes you in an area effect, such as the explosion of fireball). On a failed save, the creature must choose a new target or forfeit targeting someone instead of you, potentially wasting the attack or spell. On a successful save, the creature is immune to this effect for 24 hours. An undead is also immune to this effect for 12 hours if you target it with an attack or a harmful spell.

Deathly Defiance

Starting at 6th level, you can give yourself vitality when you cheat death, help someone else cheat it, or bring something closer to it. You can regain hit points equal to your Constitution modifier plus your Charisma modifier (minimum of 1 hit point) when you succeed on a death saving throw, stabilize a creature with spare the dying, or damage a creature with your chosen cantrip at level 1.

Once you use this feature, you can't use it again until you finish a short or long rest.

Undying Nature

Beginning at 10th level, you can hold your breath indefinitely, and you don't require food, water, or sleep, although you still require rest to reduce exhaustion and still benefit from finishing short and long rests.

In addition, you age at a slower rate. For every 10 years that pass, your body ages only 1 year, and you are immune to being magically aged. You also gain resistance to poison and necrotic damage, and advantage on saving throws against being poisoned.

Unnatural Persistence

When you reach 14th level, you partake some of the true secrets of the Undying. On your turn, you can use an action to regain hit points equal to your Constitution modifier times your warlock level. Additionally, you can put a severed body part of yours back in place when you use this feature, and the time is changed to a bonus action.

Once you use this feature, you can't use it again until you finish a short or long rest.