Plague-Touched

Whether it was some ancient curse passed down from your ancestors, or a blessing of a deity, you have been blessed with a body capable of carrying the most dangerous diseases. 

Though carrying various toxins and diseases, the Plague-Touched is not contagious as long as he holds his powers within him. A strange and wondrous power to behold, the Plague-Touched can manipulate poisons and contagions at will. The power to absorb another's sickness from their bodies, or to place more within.

While the caster themselves are not completely affected by their gifts, the power does not come without cost.The more the wielder uses their powers, the more their appearance can be affected by whatever toxins they hold within themselves. Black or Yellow eyes, a balding head, rashes, or perhaps dark black veins appear throughout the skin. But this is only with extensive use of their powers.

Truly a terrifying magic. Those who know of it are right to fear it.

Vessel of Plague

Starting at 1st level, your magic is dark and ancient , far different from other sorcerers. Your spellcasting ability is Constitution and you use Constitution in place of Charisma for any sorcerer class ability. As well as this, you do not gain proficiency in Charisma saving throws at 1st level, instead you gain it in Constitution saving throws. You also gain the following features:

• You are immune to disease and have advantage on checks vs poison.
• You can learn necromancy spells from any class(They will count as sorcerer spells for you and will use your Constitution).
  Carrier

Carrier

Starting at 1st level, your body is a wellspring of sickness and disease. After a long rest, your body creates charges equal to half your Constitution modifier. These charges contain the diseases and poisons you have absorbed throughout your journeys and you may choose what affects your charges have as long as you have absorbed the effect in the past. As an action, you have the ability to absorb one poison or disease from any target with a touch of your hand and place it within yourself to gain a charge. You are completely unaffected by any poison or disease absorbed in this manner. The amount of charges you can hold within yourself are equal to your Half your combined Sorcerer level + Constitution modifier rounded up.

• As a bonus action, you may consume your stored charges and heal yourself for X amount of charges times your Constitution modifier. This permanently removes any charges used. You can absorb 1 charge a day equal to your Constitution modifier. (Example: with a Constitution modifier of +3 you can absorb 1 charge 3 times in one day, or 3 charges 1 time a day etc.)
• Alternatively as an action, you extend your hand toward a creature you can see within 30 ft and release a winding trail of disease and decay from your palm. The creature must succeed on a Constitution saving throw or take 1d12 poison damage. If the creature fails it's save, you can expend one charge and the target suffers the poison condition or a disease that you have been harbouring of your choice. This spell's damage increases by 1d12 when you reach 5th level (2d12), 11th level (3d12), and 17th level (4d12) This ability can be affected by Metamagic.

Pestilence

At 6th level your self contained poisons and diseases have evolved to be more toxic deadly.

• Any Constitution save vs your spells are done so at disadvantage.
• Creatures who are naturally resistant to poison/acid/necrotic damage lose their resistance vs your spells.
• Creatures who are immune to disease/poison have to make a Constitution save with advantage to resist your diseases/poisons.

Virulent Sorcery

At 14th level, your mastery of plagues and poisons has become so twisted and rampant that they can break through any defenses. You gain the following features:

• Creatures who are immune to poison/acid/necrotic damage are only resistant vs your spells and can not be healed from their effects in anyway.
• Creatures who are immune to disease/poison are no longer immune vs your spells.

Herald of The Plague

Starting at 18th level, your body and soul are infused with the power of plague.

• You are immune to poison effects, and poison and acid damage.
• Any spell you cast successfully on enemies, or if it damages any enemies, can spread your stored disease charges to targets equal to however many charges you wish to spend. For example, if you damage 10 enemies with a fireball spell, they are all susceptible to your disease charges should you spend them. Then they must make constitution saves as normal.