Fiovnuru, the Old Worm

From your first memory, you've always felt his presence in the world around you.  For many years, in the beginning, you weren't sure what it was that you were aware of, but you knew that something powerful existed, and that power was watching you.  And everyone you met in life seemed to sense this also.  The small birthmark in the shape of a dragon on your back appeared to be his mark.  Then, one day, something happened in your life, a traumatic event that would change your life forever.  And he spoke to you for the first time.  And you knew then why the birthmark was in the shape of an ancient dragon.

He is Fiovnuru, also known as the Old Worm, a primeval and fearsome dragon so ancient that stories of him have passed from legend to myth.  He has lived longer than most, and knew a time when all dragons were of the same thought.  His voice came to you on that day, telling you of the power he would offer you if you would serve him.  It was fate, and you knew that serving the Old Worm was what you were called to do.

Extended Spell List

This ancient dragon gives you the power to cast spells from an expanded list when you learn a warlock spell. The following spells are added to the warlock spell list for you.

1st Level - Command, Guiding Bolt

2nd Level - Heat Metal, Levitate

3rd Level - Fireball, Wind Wall

4th Level - Fire Shield, Ice Storm

5th Level - Cloudkill, Flame Strike

Ancient Presence

Each person who meets you becomes aware of an ancient presence in your life.  Beginning at 1st level, you have been given the ability to increase his presence in you, causing all creatures within 10 feet of you to make a Wisdom saving throw against your warlock spell save DC.  All creatures that fail their saving throws are frightened of you until the end of your next turn.  This can be done, as a bonus action, a number of times equal to your Charisma modifier (minimum of 1) per long rest.

Draconic Presence

Beginning at 6th level, your body and personality begin to take on characteristics that show the Old Worm's presence in your life.  You begin to desire battle, yet you also feel an intense hunger for justice in the world around you.  As your eyes begin to take on the look of a serpent's eyes, with yellow iris' and pupils that split vertically, your vision begins to change with it.  In cooler or colder climes, you can make out warmer areas that represent living bodies, able to see warm bodies in the dark up to 30 feet away as long as their body temperatures are warmer than the air around them.

Draconic Resistance

Beginning at 10th level, your body has progressed in its change that you are now resistant to one specific type of damage.  (roll a d8 - 1:fire, 2:cold, 3:acid, 4:piercing, 5:bludgeoning, 6:force, 7:lightning, 8:slashing)  Physically, your skin has begun to take on a rough, reptilian surface as scales begin to form over your body.  The color will reflect your damage resistance and mental presence, and will add a +2 to your armor class.  (If you already benefit from draconic skin and its resistances and armor class, these changes will add a +1 to your armor class)

Draconic Warlock

Beginning at 14th level, the Old Worm's presence in your life gives you the ability to fly, as if the fly spell has been cast upon you.  This ability does not require any concentration to perform, and can be accomplished by you for a period no longer than 30 seconds every 90 seconds.  Your fly speed is equal to your walking speed.  If you are aloft at the end of a 30 second flight, you will slowly drop to the ground as if a feather fall spell has been cast upon you.  Whenever you are flying, great wings that seem to be made of shadow will sprout from your shoulders, remaining until you land each time.