Heavy Armor Master (PHB '24)

General Feat (Prerequisite: Proficiency in Heavy Armor)

You can use your Heavy Armor to deflect strikes. You gain the following benefits:

Ability Score Increase. Increase your Constitution or Strength score by 1, to a maximum of 20.

Damage Reduction. When any Bludgeoning, Piercing, or Slashing Damage is dealt to you while you’re wearing Heavy Armor, the damage is reduced by an amount equal to your Proficiency Bonus.