Heavy Armor Master.1

Prerequisite: Proficiency with Heavy armor

You can use your armor to deflect strikes that would kill others. You gain the following benefits:

• When flanking you, enemies don’t gain advantage on attack rolls against you when you are wearing heavy armor.
• While you are wearing heavy armor, bludgeoning, piercing, and slashing damage that you take from weapon attacks is reduced by your proficiency modifier. Magical heavy armor that grants a bonus to AC (+1/2/3) will stack with the damage reduced by the value of the magical armor (+1/2/3).