Gift of the Draconic Affinity

You’ve manifested more of the power of your draconic heritage, granting you the following benefits:

• When you deal damage of the type associated with your draconic ancestry, you can add your Constitution modifier to one damage roll.
• When you take damage of the type associated with your draconic ancestry, you can use your reaction to give yourself resistance to that instance of damage. You can use this reaction a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.