The Dead Mists

The starry expanse of the Astral Plane contains horrors both great and small, but none rival the mass of astral fog known as the Dead Mists. An inky smoke that curls and drifts about the plane, they are infamous for claiming every incautious traveler that wanders into their misty embrace. Yet the Dead Mists aren't a mere astral hazard: they possess a grim intelligence, and a bottomless well of necromantic power.

Warlocks that embrace the Dead Mists unlock a terrible type of necromancy: the ability to trade pure life essence for arcana. As such, the Dead Mists slowly consume their warlocks, granting them surges of arcane power in exchange for every drop of life they possess.

Expanded Spell List

The Dead Mists let 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. New spells are marked with an asterisk.

Dead Mist Expanded Spells

1st - dead mist lash*, fog cloud

2nd - detect thoughts, protect threshold*

3rd - clairvoyance, dead fog*

4th - black tentacles, confusion

5th - cloudkill, scrying

Drink the Mists

Starting at 1st level, you learn to draw the withering Dead Mists into your soul, granting you eldritch insights and power at the cost of your health. As a bonus action, you can choose to lose hit points equal to 1d8 for each level of your Pact Magic spell slots. At the start of your next turn, you regain an expended Pact Magic spell slot. If this ability reduces you to 0 hit points, you are knocked unconscious, even if you have temporary hit points.

Because of the soul-draining nature of the Dead Mists, you can't regain hit points from any spell you cast.

Feed the Soul

Starting at 6th level, your body begins to merge with the Dead Mists, allowing you to heal your mortal form by burning eldritch energy. As an action on your turn, you can consume one of your available Pact Magic spell slots to regain 1d8 hit points for each level of the spell slot consumed. This amount of healing can't be increased or maximized.

Fog Form

At 10th level, you learn to fully immerse yourself in the Dead Mists, transforming into a hazy, misty reflection of your true self. As an action, you can cast the spell gaseous form, targeting yourself only, without using a spell slot.

Master of the Mists

Starting at 14th level, once on each of your turns when you deal necrotic damage to a hostile creature with a warlock spell, you drain some of the target's life essence with the Dead Mists. You regain hit points equal to 1d8 + your Charisma modifier, up to a maximum of the damage dealt.