Lightning Reflexes

You have honed your reflexes to an uncanny level, making you move with extreme precision and allowing you to react with unnatural speed. You
gain the following benefits:

• Once per turn when you use your reaction, you may gain an additional reaction until the start of
  your next turn. You can use this feature a number of times equal to your dexterity modifier (a minimum of once). You regain all expended
  uses when you finish a long rest.
• When you make a dexterity saving throw, you can use your reaction to gain advantage on that saving throw.