Prismatic Spellcasting

You have learned how to manipulate the specifics of your spells' components in order to change the damage type of your spells. When you cast a spell of 1st level or higher, you can choose to change the damage type of a spell that deals acid, cold, fire, lightning, poison, psychic, or thunder damage to any other damage type on that list. Once you have used this ability a number of times equal to your spellcasting ability modifier, you must take a long rest before you can use it again.