Hellsinger

Your sorcerous power comes from the Infernal Plane, the fury of the plane flows into you and gives you a special "voice", the voice of the Hellsinger. While fighting as a Hellsinger, you use your newfound "voice" to unleash Hell on your enemies. 

Silent No More

Starting at 1st level, you can replace your own voice for verbal components with your arcane focus. You still make noise if you do this, it just sounds like an Infernal guteral growl.

When you reach 3rd level in this class, you learn the hellish rebuke 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.

Dissolution

Starting at 1st level, the fury brought from the Infernal Plane  makes you difficult to defeat. 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.

Infernal Overcharge

At 6th level, you gain the ability to channel your rage into your spells and weapons, adding addition fire damage to them. As a bonus action, you can spend up to 3 sorcery points on this feature, for each sorcery point you spend, the next attack or damaging spell you cast this turn adds an additional 1d8 fire damage to the total damage for each sorcery point spent. If the attack misses, the points are lost.

If you have used a metamagic feature that allows this spell to hit multiple targets, the extra damage is applied to both targets.

Ascension

Starting at 14th level, you can use a bonus action to manifest a pair of spectral wings from your back. While the wings are present, you have a flying speed of 30 feet. The wings last until you’re incapacitated, you die, or you dismiss them as a bonus action.

You can’t manifest your wings while wearing armor unless the armor is made to accommodate them, and clothing not made to accommodate your wings might be destroyed when you manifest them.

Poetry of Cinder

Starting at 18th level, you have immunity to fire damage. As an action you can spend 6 sorcery points to create a burning clone of yourself. This copy will perform the same cantrip or attack action as you did this turn or it will perform a cantrip or attack action of your choice. The copy has your stats for the purposes of attacks with it. If you use Infernal Overcharge, it also charges up the next attack of the clone as well.

The clone cannot be destroyed but it does dissipate after 3 rounds, leaving behind a pile of ash.