the Chromatic

You have made your pact with an ancient dragon of godlike power, or perhaps even the Gods of the dragons themselves, having gained favor with these powerful beings, they have decided to bestow upon you a boon of remarkable power, whether it be out of curiosity, boredom, or as a reward for a deed done, they have granted your soul and body the unkempt fury of the Chromatic Dragon

Your Patron has given you an immense power that your body has trouble wielding for a significant amount of time, using its power to its fullest extent is physically taxing, but can be deadly in the hands of those who aren't afraid to see their enemies Crumble to ash before their eyes. Those who walk the path of the Chromatic are able to call upon their Dragon Soul to wreath themselves in Draconic energy and rain hell upon their enemies

Expanded spell list

The Chromatic 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.

Chromatic Expanded Spells

Touch of the Chromatic

Starting at 1st level, as a bonus action you can choose fire, cold, acid, poison,  or lightning damage. if you cast a spell that does elemental damage, you can choose to have it do your currently chosen damage type.

Spells altered using touch of the chromatic must deal Fire, cold, acid, poison, or lightning damage to be affected by it

Additionally you can choose whether to use Constitution as your spellcasting modifier instead of Charisma. 

If constitution is chosen, any warlock invocation that uses charisma as a modifier uses constitution instead in the same way.

Charisma

Charisma is your spellcasting modifier

Constitution

Constitution is your spellcasting modifier

Draconic Overcharge

At first level once per short or long rest when you cast a spell that does elemental Damage, instead of rolling you do the maximum amount of damage possible 

Dragon Soul

Starting at Sixth level As a bonus action, the latent power your Patron bestowed upon you surges through you and you become wreathed in Draconic energy.

For one minute, while Dragon soul is active, you can add your Spellcasting modifier (minimum of +1) to the damage roll of any elemental spell that you cast. The damage bonus applies to one damage roll of a spell, not multiple rolls.

Additionally while it is active your Armor Class equals 10 + your Dexterity modifier + your Warlock Spellcasting modifier and you have resistance to your currently chosen element through Touch of the Chromatic Feature.

You can activate Chromatic soul a number of times equal to your Spellcasting modifier(minimum of 1). Expended uses are replenished after a short or long rest.

Dragon Form

At tenth level Your Dragon Soul begins to take shape, empowering your attacks and mobility.

You can fly while Dragon soul is active,  you have a flying speed equal to your walking speed +10 ft. 

You can expend a use of dragon soul to change your chosen element as a reaction.

While dragon soul is active, when you cast a cantrip that deals fire, cold, acid, poison, or lightning damage and requires an attack roll, you can choose to make a separate attack roll for each damage die, treating them as their own attack. You can direct the attacks at the same target or at different ones. Any invocation or items that directly affect eldritch blast also affects these cantrips in the same way.

Frightful Presence

At fourteenth level, once per short or long rest, as an action while Dragon soul is active each creature of your choice that is within 120 feet of you that you are aware of must succeed on a spell save DC Wisdom saving throw 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.