Due to your demonic powers, you have improved vision in the dark, however, many generations of human only breeding have reduced the power of your darkvision.  You can see in dim light within 30 feet as though it were bright light, and in darkness as though it were dim light. You cannot discern colors in darkness, only shades of gray.

Your ability scores each increase by one.

Demon Kin reach adulthood in their late teens, however cease physical aging in their late twenties or early thirties. their aging resumes when their age reaches that of a century, so they often live one hundred fifty to two hundred years old.

Demon Kin are almost always of chaotic alignment, but they will lean towards any spectrum of that. Many heroes and villains are Demon Kin.

Demon Kin vary widely in height, although they are all fit, but not buff. They can be barely five feet tall, or well over six feet. regardless of their position in that range, their size is always medium.

Your base walking speed is thirty feet.

You can read, write, and speak Common and your choice of either Abyssal or Infernal.

At level five, you gain the ability to cast demonic spells as cantrips. at fifth level, you can cast Thaumaturgy, at seventh level, you can cast Hellish Rebuke, and at tenth level you can cast Darkness.

At twentieth level, you have matured to the point that the demonic side of you fully awakens. Your appearance changes in one of the following ways: Your eyes turn red, and your pupils are slitted, your fingernails are now talon-like, or you grow small horns atop your head. You also gain the ability to add one of the following spells to your spellbook as a cantrip. However, you can only cast it once before you take a long rest. The spells are as follows: Time Stop: "You can freeze time for 4d4 seconds. Once you do so, you can take actions if you are in combat, or move around freely if you are not. 1 turn takes 4 seconds. You have advantage on all attack rolls, and enemies cannot take attacks of opportunities on you.", Engulf in Flames: "As an action you can choose to cast Engulf in Flames. Engulf in Flames can target any enemy that you can see. If you target an enemy, they must make a DC18 WIS saving throw. On a success, they take 1d20 fire damage each turn. On a failure, they take 2d20 fire damage each turn. It is impossible to put out the fire unless the caster is incapacitated.", and Void Eater: If you are within five feet of an enemy, you can touch them and cast Void Eater. Once they are affected, they must make a DC18 WIS saving throw. On a success, they move five feet in the opposite direction of you, and take 1d20 necrotic damage. On a failure, they are engulfed in a void, and will take 2d20 necrotic damage every turn. The void cannot be released unless the caster is incapacitated."