Due to your snakelike origin, you can see through darkness as if it were bright light in 120 ft. This penetrates magical darkness as well. 

Your Charisma score increases by 2, and your Wisdom score increases by 1.

BIte. Your fangs are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal piercing damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike. 

Size. Yuan-ti Nightmare Speakers are the kind of malison that has a human head and torso, but the bottom half of a large writhing snake. Your size is medium. 

You gain proficiency in two of the following that you choose: Arcana, Insight, Persuasion, Intimidation, or History. 

Over the years, you have learned ways to manipulate the minds of others.