Your Strength score increases by 2, and your Constitution score increases by 1.

Pit fiends, like other fiends, usually have an extremely long lifespan. Due to their power and prestige, it is likely they do not age nor die of it.

While they are evil, pit fiends still abide by their infernal laws usually.

Pit fiends usually stand 12-15 feet tall and weigh 700-1000 pounds. Your size is Large.

(Discuss this with your DM. If they are not ok with your size, you can be the maximum size of a Medium creature)

Your base walking speed is 30 feet.

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.

At 5th level, you gain a flying speed of 30 feet.

Due to your more frightening appearance, you are easily able to instill fear. You are proficient in the Intimidation skill.

Born of the infernal depths, you are highly heat resistant. You are resistant to fire damage.

You have sharp fangs which ooze potent, virulent venom. As an action, you may make a powerful bite with you mouth as a natural weapon. If you hit, you deal poison damage equal to 1d6 + your Constitution modifier. This damage increases by 1d6 when you reach 3rd level (2d6), 5th level (3d6), 11th level (4d6), and 17th level (5d6). You regain use of this trait when you complete a short or long rest.

You can read speak and write Common and Infernal.