- When you gain this feature you pick a arm (Left or Right). After this, that arm breaks up and disintegrates. Connected to your body where your arm was there is a mysterious black magic connected that can shape as an arm with a hand and fingers if you want. This can shape and do many things. 

- Can shape into anything your mind can think of however all attacks deal 1d12+5 damage

- At level 9, whichever side you chose, that whole side of your body is now engulfed in that same darkness. Half your face and chest, your arm and leg on that side. 

-  You can take an action called (The Spread of Darkness) This allows you to touch one enemy or item, and turn it into a darkness empty shell (useless) This requires a roll of 2d20 with a AC of 35. Remember that moving to and away from the enemy allows for a opportunity of attack. You can do this once per long rest. 

-You can take an action called (Dark Embrace) This engulfs your whole body in darkness for one turn. You instantly regain 1d12+5 Hp, and until the end of your next turm you cannot do anything, but are invincible and impossible to hit or deal damage to. You can do this once per short rest. 

- (Demon Fly) You can cast this once per short rest (Cannot use during combat) Your darkness covering your back creates a wing allowing you to fly for 30 minutes without stop unless you engage in combat. 

- You can take an action called (Dark Nebula) Your once arm separates from your body and turns into a massive ball of darkness. 5 ft Wide 5 ft Tall. As a bonus action you can send it toward the enemy. This will hit with a Dex save DC 13 if success take half damage. The damage is 6d8. You can also hold the ball until your next turn in which you are granted 2 actions if you send the nebula first. 

- At level 19 Your whole body gets completely engulfed in darkness and your eyes turn fully red

- Unarmed attacks do 20 damage

- (Demon possession) Once per turn you can touch a enemy taking over their body. You take a turn in their body immanently and can do whatever you want, even ending your own life. After you take this turn you go back to your body and end your turn. To do this, 1d20 with a DC 10. 

- (Demon blackout) All living creatures within a 10 feet radius collapse and 2 of your choice dies immediately if you roll 1d20 with a DC 15. You must tap them to wake up.

- (Dark snow) Orbs of darkness float about the room, 50 of them. If one touches a living creature the creature dies. You control them as you wish. On each of your turns you can move 4 of the orbs. After 2 turns they vanish. 

- At level 20 this automatically takes affect!  (Death of Demons) Everything within a 100 feet radius of you dies, the demon in you takes control and you disappear to the underworld. This ends your life!