The Sovereign Shadow

Your patron is one of the unseen rulers of the Shadowfell. A shadowy being of unknown intentions that deals in secrets and souls enigmatically. The Shadowfell is a dismal plane of apathy and death: within, there are powerful and forgotten masters of shadow magic who rule all that wander within their realm. These patrons are rumored to bestow some part of their knowledge to those who dare call their name.

A patron from Shadowfell often has intents that mirrors the plane in which they reside; darkness, death, and entropy.

Expanded Spell List

The Sovereign Shadow grants you it's knowledge, increasing your comprehension of spell casting. If you learn the spell Darkness, it may be cast without material components and  the following spells are added to the warlock spell list for you.

Sovereign Shadow Expanded Spells

Spell Level	Spells
1st	inflict wounds, sleep
2nd	pass without trace, spiritual weapon
3rd	spirit guardians, blink
4th	phantasmal killer, greater invisibility
5th	dominate person, hallow

Shroud of Darkness

Starting at 1st level, you gain a number of Shadow charges equal to your Warlock level. You regain a charge when you reduce an enemy to 0 hit points; the maximum number of charges is equal to your Warlock level.

If you move on your turn, you can spend a charge to become wrapped in shadows until the start of your next turn. While shrouded, you cannot be hit by opportunity attacks and you ignore difficult terrain. If you pass through a creature they must make a Constitution saving throw or take 1d2  necrotic damage (multiplied by your Warlock level) once this turn. You must finish your turn in an unoccupied space.

You regain all charges on a long rest.

Glooming Apparition

Starting at 6th level, you have gained further mastery over the shadows, your physical form seems to phase in and out between the Shadowfell and the Material Plane. You gain resistance to bludgeoning, piercing, and slashing weapons while in dim light or darkness. 

Additionally, while you are within dim light or darkness or as a reaction, you can cast Gaseous Form on yourself at will without consuming a spell slot.

Shadow Walk

At 10th level, you gain the ability to step from one shadow into another. When you are in dim light or darkness, as a bonus action you can teleport up to 30 feet to an unoccupied space you can see that is also in dim light or darkness. You can also use a Shadow charge to instead teleport up to 60 feet. Non-magical attacks have disadvantage against you until your next turn. 

Shadow Domination

Beginning at 14th level, you gain complete mastery over both soul and shadow.

As an action, choose a number of creatures equal to your Charisma modifier (at least 1) that you can see. Each creature must make a Wisdom saving throw against your warlock spell save DC. On a failed save, the creature is Paralyzed for 1 minute or until your Concentration is broken.

You must finish a long rest before you can use this feature again.