Shield Guardian's Gift

You have developed traits similar to that of a shield guardian, granting you the following benefits:

Regeneration. At the start of your turn, you can regain a number of hit points equal to your proficiency bonus. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Shield Guardian's Protection. When a creature makes an attack against a creature within 5 feet of you, you can use your reaction to give the creature a +2 bonus to AC against that attack. If you are wielding a shield you can use the shield's AC bonus instead. You can choose to use this feature after the creature makes its roll, but before the DM determines whether the attack roll hits or misses.