Castle Crusher

You’ve developed the skills necessary to be considered a being of siege, with tales of you busting down doors and utterly destroying everything in your path. You gain the following benefits:

• You have advantage on attack rolls against a Objects, Structures and Constructs (The Constructs can be no larger than medium size to gain the effect of the feat)
• You are considered a "Siege Monster", meaning you deal double damage to Objects and Structures
• When you attack a Construct type creature you can add your proficiency bonus to your damage.