Twist of fate

As you begin casting Twist of fate a ray of energy will be released from the caster. As this happens a plea will be sent out to the fates. Roll a d20, if you land on an even number then you can cast any spell you know with the bonus that it gains at 9th level. After this roll a d20 again, if you roll a natural 16 or higher then the spell will hit. If it misses then you lose 5 hit dice of the GMs choosing. If you cast this spell with 5 hit dice or fewer you can add your intelligence modifier to the amount of dice rolled for damage.