The following is a subrace available to Aasimar as presented in Volo's Guide to Monsters.

Healer Aasimar

Healer Assimar are created to mend the meek more than to protect them. While they will still take a stand against evil, they are more suited to fixing the damage that evil has already done than destroying the source of that pain.

Ability Score Increase. Your Wisdom score in-

creases by 1.

Radiant Restoration. Starting at 3rd level, you can use your action to unleash the divine energy within yourself, causing a calm light to radiate from you and mend the wounds of your allies.

Your transformation lasts for 1 minute or until your end it as a bonus action. During it, spectral angelic wings sprout from your back, and you shed dim light in a 30 ft radius. In addition, when a creature you can see takes damage during the duration, you may heal them for an amount equal to half your level (rounded up) or the amount of damage dealt, whichever is lower. You cannot cause this healing again until the beginning of your next turn.

Once you use this trait, you can't use it again until you finish a long rest.