You have a pair of enchanted theater masks. You can put on either your Comedy Mask or your Tragedy Mask when you finish a Short or Long Rest, granting you the following benefits until you remove the mask or replace it with the other one.
Comedy Mask
Whenever an ally you can see or hear within 60 feet of yourself regains Hit Points or gains Temporary Hit Points, you can take a Reaction to regain the same number of Hit Points or gain the same number of Temporary Hit Points, respectively.
Tragedy Mask
When an ally you can see or hear within 60 feet of yourself takes damage that causes it to become Bloodied or drop to 0 Hit Points, you can take a Reaction to gain Resistance to the damage type the ally took until you finish a Short or Long Rest or use this benefit again.