Gift of Asmodeus

You’ve manifested some of the power of Asmodeus, granting you the following benefits:

• Ability Score Increase. Increase your Strength, Constitution, Charisma, or Intelligence score by 1, to a maximum of 20.

• Asmodeus Fury. You may imbue your attacks with the fury of Asmodeus as a free action. For the next minute, your melee attacks deal an extra 1d6 fire damage when they hit. You can use this ability a number of times equal to your proficiency modifier per long rest.
  
  
• Hellish Vengeance. You gain the ability to cast the Hellish Rebuke once with this trait and regain the ability to do so when you finish a long rest. You can then cast this spell using normal spell slots, Intelligence or Charisma is your spellcasting ability for this spell. If you already possess the use of this spell you gain an additional free cast once per long rest.