Ichor of Dredge

A cursed child born into powerful magic bloodlines. A living corruption of life and holiness they bring with them sickness and plagues. 

Eyes of the Dark

From 1st level, you have darkvision with a range of 120 feet.

When you reach 3rd level in this class, you learn the darkness spell, which doesn't count against your number of sorcerer spells known. In addition, you can cast it by spending 2 sorcery points or by expending a spell slot. If you cast it with sorcery points, you can see through the darkness created by the spell.

Fueled By Petulance

Starting at 1st level, When damage reduces you to 0 hit points, you can make a Charisma saving throw (DC 5 + the damage taken). On a success, you instead drop to 1 hit point. You can't use this feature if you are reduced to 0 hit points by radiant damage or by a critical hit.

After the saving throw succeeds, you can't use this feature again until you finish a long rest.

Aura of Decay

At level 6 The sorcerer surrounds themself in an aura of corruption, weakening their enemies' blows in combat. Everyone within a 10ft radius as disadvantage on attacks against you. This can be used once per long rest. 

Pestilent Stead

Summon a creature that is mountable Stat block to be determined. 

Plague Knight

Transform into the commander of death and decay that you hold within yourself. 

Starting at 18th level, you can spend 8 sorcery points as an action to transform yourself into a Death Knight with average hit points. In this form, you radiate an aura of fear, and a caustic cloud in a 5ft radius around you dealing 2d4 poison damage to any creature within the 5ft radius around you.

All Undead that can see you are unable to attack you.

You are still able to cast spells and use sorcerer abilities while in this form. 

You remain in this form for 1 hour. It ends early if your transformed HP hits 0, or if you dismiss it as a bonus action.