Resourceful Battle Mage

You've mastered getting the most out of your spells in combat, granting you the following abilities:

• When a spell fails by either missing all it's accompanying spell attack rolls or due to the targets succeeding on their saving throws against the spell nullifying it's effects, you can use a reaction to reabsorb the used magic to regain the spell slot you used for the spell. You can use this reaction a number of times equal to your proficiency bonus, and regain all expended uses when you finish a long rest.
• When you cast a cantrip that deals damage, add your spellcasting modifier to the damage it deals.