Planer Bloodline

Your innate magic comes from a dual heritage of the Demonic and the Divine. You might have been the result of a taboo relationship that should never have been, an arranged tumultuous treaty gone wrong between demonic tribes and divine courts or even a mad science experiment to bring about a super powered being. Perhaps you were just a normal person blessed by two creatures of opposite affinity. However you came to acquire this power, you are a rare spectacle, possessing both radiant and necrotic powers

Planer Defense

Starting at 1st level the energies of heaven and hell empower you . The heavens grant you enhanced durability. Your hit point maximum increases by 1, and it increases by 1 again whenever you gain a level in this class.

Hell would rather you be a stronger warrior and thus when you aren’t wearing armor, your AC equals 13 + your Charisma modifier. 

You can read, write, and speak Abyssal.

Unearthly Aura

You can fully embrace your Divine and Demonic energies for a time and exude energy as an outward aura. This aura is maintained for 1 minute, or until dismissed as a bonus action. The aura dissipates if you are incapacitated or killed. The aura glows in a form of your choosing .You may only use this ability two times before taking a short rest. Your steps hasten, and your base movement speed is increased by 25 feet and you gain a flight speed equal to 15 feet, and all hostile creatures within 20 feet of you must make a Dexterity saving throw or take damage (roll a 1d20 1 and 20 is psychic damage odds are Necrotic and evens are Radiant) equal to half your sorcerer level at the start of your turn on a failed save and half as much on a successful one.

Reciprocal Aid

Starting at 14th level, your magic has grown to the point where you can both take life energy and bestow it. As an action, you may spend 2 sorcery points to attempt to steal life energy from a creature that you can see within 60 feet of you and give it to either yourself, or a different creature you can see within 60 feet of you. The target creature must make a Constitution saving throw or lose 10d8 hit points and half as much on a successful save. The recipient gains hit points equal to the same amount that the target lost.

Distorting Might

At 20th level, your power becomes unobtainable for any mortal being. Your soul, which dwells within your chest, becomes overpowered by the infernal and celestial magic, corrupting the last bit of your body and making you a complete medium of Ethereal Discord.

You stop aging and your age cannot be changed by magical means, if you are not willing to. You cannot die of old age and won't suffer of its frailty.

As an action you can open a portal to the realm in-between the Heavens and Hell's Circles within 5 feet of you, as if created by the Gate spell. This Realm contains a distorted version of every plane it borders to, the portal leads to the exact same location in the the other realms as the location it was created on in another plane.
If you use this feature within the Distorted Realm, the portal leads to the Plane of you DM's choice. The portal lasts for one minute or until your concentration ends (as if you were concentrating on a spell). Once you use this feature, you must finish a short or long rest to use it again.