You have odd yet descriptive accounts of being in the Abyss, although you may have never been there. They come in visions and you feel freezing cold during them, and your concentration is broken during them

- When you encounter a fiend, you can spend a bonus action to learn either the vulnerabilities or resistances of the fiend, if any.

- This ability has 2 uses, and you must take an long rest to refresh this ability.

- You can MOSTLY speak and understand Abyssal, with most of it being phrases and broken sentences