Desperate Caster

This feat is created by Nedrapter for use in his Land of Arda campaigns, and are balanced to the hardcore nature of them. 

• Increase your Intelligence, Wisdom, or Charisma score by 1, to a maximum of 20.
• When you have no spell slots left, you can attempt to cast a spell up to 5th level. Roll a d100 and consult the following table, where X is the level of the spell cast.
  • 76-100: The spell works as intended.
  • 51-75: The spell's effectiveness is halved (rounded down).
  • 46-50: The spell's effectiveness is one-quarter (rounded down) of what was intended.
  • 31-45: After the spell is cast, you gain X levels of exhaustion.
  • 21-30: After the spell is cast, you drop unconscious for X days.
  • 11-20: The spell fizzles and does not cast, and you are stunned until the end of your next turn.
  • 1-10: The spell misfires dangerously. You take Xd10 psychic damage. This damage cannot be reduced in any way.