Your Strength and Constitution score increases by 1.

a Devil is Lawful Evil making deals with mortals and battling Demons.

Kyton are about 6 ft, some are a little taller, others a little shorter.

 If you are killed outside of Hell, you are instead returned to hell. If you are killed in Hell, your spirit is permanently destroyed. You cannot be raised from dead, except by very powerful effects like a wish spell or divine intervention.

Magical darkness doesn't impede your Darkvision.

Accustomed to the dark pits of the Nine Hells, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

When you hold a normal chain, it sprouts spikes and hooks along its length. Upon losing your grip on the chain, these growths immediately vanish. You can use chains as a weapon and are always proficient with them. While using a chain one-handed, the chain deals 1d8 slashing damage. While using a chain two-handed, the chain deals 1d10 damage and has the Reach property. When you take the Attack action and make an attack with a chain, you can use a bonus action to initiate a grapple with the target of your successful attack.

Upon reaching 5th level, as an action, you can animate a chain to fight for you. One mundane chain within 60 feet sprouts hooks and barbs, and animate under your control for 1 minute, provided that the chain is not being worn or carried. When you use this ability, you can make a melee weapon attack against a creature within 5 feet of the chain. On a hit, the target takes slashing damage equal to 1d8 + your Strength modifier. The animated chain is an object with AC 20, 20 hit points, resistance to piercing damage, and immunity to psychic and thunder damage. As a bonus action on your turn, you can move the chain up to 20 feet and repeat the attack against a creature within 5 feet of it. After you use this ability, you can't use it again until you complete a short or long rest.

You can speak, read, and write in Common and Infernal.