Demonic Soul

Demonic Soul Sorcerers are blessed by a powerful demon lord with magical power

Demonic Blood

You have a powerful fiend as your ancestor. Starting at 1st level, you can speak, read, and write Abyssal, and you double your proficiency bonus for CHA checks involving Fiends. 

Destructive Casting

Starting at first level, you can add your charisma modifier to the damage roll of a spell of first level or higher you cast once per turn

Fiendish Power

At sixth level, spells you cast ignore resistance to fire and necrotic damage. In addition, when you roll damage for a spell you cast that deals fire or necrotic damage, you can treat any 1 on a damage die as a 2.

 

Fiendish Flight

At 14th level, you gain the ability to sprout a set of spectral fiendish wings from your back, gaining a flying speed equal of 30. You can create these wings as a bonus action on your turn. They last until you dismiss them as a bonus action on your turn.

 

Flames of the Abyss

When you reach 18th level, you can use your reaction when you take fire or necrotic damage to take no damage. Instead, you regain hit points equal to half the damage dealt, and the person who dealt the damage takes half the damage dealt (This damage ignores resistance and immunity). 

You can use this feature a number of times equal to your charisma modifier