Speach of the Fallen

Fall though you may be, you have learned to embrace the darkness with in you, and by sharing the darkness with others, you can even do them harm. You utter a string of unsettling words that make clear to your foe the darkness in your heart. They must pass a wisdom save equal to 8 + your charisma modifier + your proficiency bonuses or take 1d8 necrotic damage. If the spell hits a target who is concentrating on a spell, the caster must make all constitution saving throws to maintain concentration on the spell with disadvantage until the start of your next turn.

The effect's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).