Whether you are the descendent of a humanoid that gained the favor of, or stumbled your way through life into a contract with, or are the offspring of a polymorphed Shen Lung you have acquired some of the draconic magic of the true dragons of Kara-Tur; the Lung (pronounced Lowng).The Lung serve the Celestial Emperor and the Celestial Bureaucracy as some of its many officers, collectively known as The Million Officials. They serve as guardians, lords and overseers over many areas of Kara-Tur such as the rivers, oceans and temples with each different type of Lung performing their own tasks. 

This draconic connection has greatly altered your bloodline and grants you spells reminiscent of many Lung's magical abilities that is further influenced by the Lung you hold a connection to. 

[note, this is personal homebrew, I just need it to work for the specific build, not be fully functional, if this actually gets published, please see Alternative Draconic Bloodline (Eastern Dragons) by Smaug for the full subclass of the 2014 sorcerer]

Level 3: Gifts of the Lung

Your connection to the Lung grants you certain boons. You become adapted to extreme, non-magical cold and can ignore the effects of cold weather and frigid water. You gain a swimming speed equal to your walking speed, and can breathe underwater. You also learn the Celestial and Draconic languages. 

Level 3: Bloodline Spells

When you reach a Sorcerer level specified in the Bloodline Spells table, you thereafter always have the listed spells prepared.

Bloodline Spells

Sorcerer Level	Spells
3	Absorb Elements, Invisibility, Speak With Animals, Spiritual Weapon
5	Fly, Spirit Guardians
7	Greater Invisibility, Ice Storm
9	Cone of Cold, Dispel Evil and Good

Limited Shapechange

 Starting at 6th level, you gain the shapechanging abilities of the Lung and can use it to change your form into various creatures.

As an action you assume the form of a different creature. This feature functions as the shapechange with the following exceptions: The chosen form must be a humanoid or beast, the form must have a challenge rating equal to half your proficiency bonus or lower (rounded down), this feature does not require concentration, this feature is not considered a spell and cannot be targeted by effects such as dispel magic, this feature can last up to a number of hours equal to your proficiency bonus and you can end it as a bonus action. 

Once you use this feature you can't use it again until you finish a long rest. 

Improved Shapechange

At 14th level, you have gained greater control over your polymorphing abilities and can now turn into a myriad of new forms. The following changes are made to your Limited Shapechange Feature:

The chosen form can also be a dragon, elemental, fey, giant, monstrosity, ooze, or plant and it must have a challenge rating equal to or lower than your proficiency bonus. 

Servant of Heaven

Beginning at 18th level, you gain the shapeshifting powers inherent in all Lung, as well as powerful magic of the Shen Lung. You learn the shapechange spell and can cast it without material components. This spell counts as a sorcerer spell for you, but it doesn’t count against the number of sorcerer spells you know. 

In addition, you have access to two spells, control weather and  abi-dalzim's horrid wilting. Once per long rest you can cast one of those spells as a sorcerer spell without expending a spell slot. These spells are not considered prepared and you cannot cast them using a spell slot.