The Shadow Dragon

Your patron is a beeing not from this wolrd, a Shadow lurking through the Darkness of the Shadowfel. Once a true dragon - now something far more sinister.  Shadow dragons are true dragons that were either born In the Shadowfell or transformed by years spent within its dismal confines. They are known and feared for their predatory cunning and greed, with the oldest dragons accounted as some of the most powerful creatures in the world. Some Shadow dragons attempt to lure other creatures from the mortal realm back to the Shadowfell to make them their servants. Gifted with the power of their new master these few become agents of darkness destinied to spread the darkness and evil of the Plane of Shadow.

Expanded Spell List

The Shadow Dragon 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.

Shadow Dragon Expanded Spells

Spell Level	Spells
1st	absorb elements, inflict wounds
2nd	alter self, dragon's breath
3rd	blink, lightning bolt
4th	private sanctum, vitriolic sphere
5th	destructive wave, hallow

Recast in Shadow

Starting at 1st level, the Shadow Dragon grants you some gifts of his kind. You have darkvision with a range of 120 feet.
Also you can use your action to exhale shadowy fire in a 15 -foot cone. Each creature in that area must make a Dexterity saving throw against your warlock spell save DC. A creature takes 2d6 necrotic damage on a failed save and half as much damage on a successful one. The damage increases as you gain warlock levels, it increases to 3d6 at 6th level, 4d6 at 10th level, and 5d6 at 14th level. After you use your breath weapon, you can't use it again until you complete a short or long rest.

Shadow Stealth

Starting at 6th level your patron teaches you how to adept to the shadows. While in dim light or darkness, you can take the Hide action as a bonus action.

Frightful Presence

Beginning at 10th level you can use an action to channel the dominance of your Patron. Each creature of your choice that is within 30 feet of you and aware of you must succeed on a Wisdom saving throw against your warlock spell save DC or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to your Frightful Presence for the next 24 hours.
Once you use this feature, you can't use it again until you finish a short or long rest.

Living Shadow

Starting at 14th level you get the ability to engulf yourself in shadows. You can use an action on your turn to get resistance to damage that isn't force, psychic, or radiant for 1 minute as long as you are in dim light or darkness. Once you use this feature, you can't use it again until you finish a short or long rest.