Purple Dragon Commandant
Prerequisites 4th or Proficiency with martial weapons
Ability Score Increase. Increase your Strength or Dexterity by 1, to a maximum of 20.
Encourage Ally. As a Bonus Action, you bolster one ally you can see within 30 feet. The ally gains Temporary Hit Points equal to dice:2d6|noform|noparens|avg (2d6) plus the modifier of the ability score increased by this feat. You can take this Bonus Action a number of times equal to your Proficiency Bonus, and you regain all uses when you finish a Long Rest.
Last Stand. You have Advantage on attack rolls while Bloodied.
Sources
Forgotten Realms: Heroes of Faerûn p. 40