Fiendish Tongue

Prerequisite(s): Charisma 13 or higher

You have spent time studying fiends and their cruel hierarchy. You know their words and their names and gain the following benefits.

• You learn to speak, read, and write both Abyssal and Infernal. If you already speak one or both of these languages, choose other languages in their place.
• You have advantage on Charisma checks to interact with fiends.
• You learn the command spell, which does not count against your limit of spells known. If you cast it as a 1st level spell to target a fiend, it does not expend a spell slot. When you take this feat, choose Intelligence, Wisdom, or Charisma as your spellcasting ability for casting the spell in this way (the save DC is 8 + your proficiency bonus + your spellcasting ability modifier). You can cast it this way a number of times equal to your Charisma modifier. You regain all expended uses when you finish a long rest.