The Ancient Dragon

Your patron is an ancient spell-casting dragon, either a chromatic dragon (black, blue, green, red, or white) or a metallic dragon (brass, bronze, copper, gold, or silver} Dragons vary from lawful good to chaotic evil and often have far-reaching, inscrutable goals on account of their extremely long lifespans and great power. Some merely desire agents to help them locate and obtain treasures for their hoard, but most do so for reasons that may only come up once every few decades. Many ancient dragons have acquired enough magical skill to share their power in a pact. Some aspiring warlocks even make pacts with the dragon goddess Tiamat, making a bargain with one of her five heads in particular and drawing on her power as a dragon rather than as a fiend or goddess. You choose the scales of your dragon, or determine it randomly, using the Dragon Kind table. Each dragon is associated with a damage type and a breath weapon.

Expanded Spell List

The Fiend 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.

Fiend Expanded Spells

Spell Level	Spells
1st	burning hands, command
2nd	blindness/deafness, scorching ray
3rd	fireball, stinking cloud
4th	fire shield, wall of fire
5th	flame strike, hallow

Breath of the Wyrm

You can use your Breath Weapon the amount of times equal to your Charisma Modifier. Additionally when you use an ability or spell that does the same damage type as your Dragon's type you can re-roll 1's, but must take new roll. After using this ability you must take a long rest to regain these abilities. 

Everlasting Scales

At 6th level your body has mutated and changed. Your body has begun sprouting scales of the colour of your patron. Your patron grants you the ability to draw on the true might of its scales. Before you take damage, you can use your reaction to harden your scales for a brief moment. Until the end of your next turn, you gain resistance to bludgeoning, piercing, and slashing damage, and immunity to the damage type dealt by your Breath of the Wyrm feature.

Once you use your reaction in this way, you can't do so again until you finish a short or long rest.

Draconic Wings

Starting at 10th level, You gain the ability to sprout a pair of dragon wings from your back, gaining a flying speed equal to your current speed. You can create these wings as a bonus action on your turn. They last 10 minutes or when you dismiss them as a bonus action on your turn.

You must take a long rest to regain this feature.

Visage of the Dragon

At 14th level, you may project the absolute might and majesty of a dragon. As a bonus action, you may cause the illusion of your patron to rise and surround your body. You gain the following benefits:

- At the start of your transformation each creature of your choice that is within 120 feet of you aware of you must succeed on a Wisdom saving throw or become your choice of Frightened or Charmed 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 this effect for the next 24 hours.

- You may use your action to make the following attack:

Spectral Breath (3 charges). The dragon surrounding you exhales in a 60-foot line that is 5 feet wide. Each creature in that line must make a Dexterity saving throw, taking 8d6 psychic damage on a failed save, or half as much damage on a successful one. If a creature succeeded on their saving throw, they gain advantage on future saving throws against this ability until their next long rest.

This ability lasts one minute and can't be used again until you finish a long rest.