Tireless Reveler

Tireless Reveler
Feat

When an ally you can see within 60 feet of yourself expends Heroic Inspiration, you can gain Heroic Inspiration if you lack it. You can use this benefit a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Short or Long Rest.

Source: Astarion's Book of Hungers (ABH), page 8