dragonbound

a dragon has marked you and bound you to its being, the ancient magic of the creature now flows through you magic ever so slightly. Depending on the relation with the dragon this could be as a slave, guardian, or perhaps some cruel twist of fate binding the two of you together.

dragons protection

At third level You gain resistance to the elemental damage associated with your dragon (see draconic bloodline sorcerer) You also speak draconic

Black	Acid
Blue	Lightning
Brass	Fire
Bronze	Lightning
Copper	Acid
Gold	Fire
Green	Poison
Red	Fire
Silver	Cold
White	Cold

 

Wyrm's tempo

Starting at 6th level, your draco song increases in tempo further rousing your allies who can hear it using a bonus action you may upgrade all ally's inspiration dice who may hear you within 60 feet ex. d4 become d6, d6 becomes d8 etc. Alternatively you may use a bardic inspiration die to upgrade all ally's current inspiration die to its max level. 

at level 10 when using spells with verbal components you may increase the level of party members inspiration dice as long as the verbal components are fulfilled in game, this may be done in conjunction with the bonus action. Meaning you may increase party members inspiration dice by two levels per turn

Wyvern's intermission

At 14th level, your inspiration has lingering effects that continue to embolden those who hear it, when an ally uses a d12 inspiration die, they gain a d4 inspiration after the die would be consumed, granting them a secondary use of inspiration

Dracosong Inspiration

Also at 3rd level, your inspiration is augmented by the draconic power flowing through you. A creature that has a Bardic Inspiration die from you can roll that die and add the number rolled to their attack adding the damage associated with your bound dragon. Alternatively, when an attack roll is made against the creature, it can use its reaction to roll the die and damage the attacker with the element associated with your bound dragon.

The inspiration die may be used as 2d4's at 5th level, 1d6 and a d4 at 10th level, 2d6's  or 3d4's at 15th level. These may be split between party members