Your Constitution increases by 1 and another ability of your choice is increases by 2.

You do not age and magic can not force you to age. You are a Fiend.

You have resistance to fire and necrotic damage.

Demons range anywhere from a few feet tall to over a dozen feet. You may choose to be either small, medium, or large.(Being large is not as good as you might think. Just a warning)

Your base walking speed is 30 feet.

You are a demon and must consume souls to survive. You must devour at least one soul a month, or starve. For every month you go without eating a soul, you permanently gain 2 levels of exhaustion until you eat another soul.

Whenever you kill a creature, you may choose to "harvest" their soul and turn it into a coin. These coins can be of different values depending on how many times the person has been reborn or what they achieved in life. The values are as follows
1-50: Copper - Extremely common(Worth 1 Soul Points)
51-75: Silver - Common(Worth 5 Soul Points)
76-90: Gold-Uncommon(Worth 10 Soul points)
91-99: Platinum-Rare(Worth 30 Soul points)
100: Ivory-Very Rare(Worth 100 Soul points)
The more Soul points you consume, the more powerful you become. You must keep track of each soul you eat throughout the campaign and add up the Soul Points. The more points, the stronger you become:

1-9 Soul Points
No Buffs
10-50 Soul Points
+10 maximum health
Demonic Hunger Increases by 1.
51-100
+15 maximum health
Demonic Hunger Increases by 2.
101-150
+20 maximum health
Demonic Hunger Increases by 3.
151-200
+25 maximum health
Demonic Hunger Increases by 4.
201-300
+30 maximum health
Demonic Hunger Increases by 5.
301-400
+40 maximum health
Demonic Hunger Increases by 6.
(Demon Lord-Must be Level 17): 400+
+50 maximum health
Demonic Hunger Increases by 10.

Your Demonic Hunger is an ability that your character has that shows their willingness to kill and survive. This ability gets stronger the more souls you consume. 

You can speak, read, and write Common and Abyssal.