Dual Shielder

You master the not-so-popular art of fighting with two shields, gaining the following benefits:

• The bonuses to AC provided by both shields stack.
• Your shields become one-handed weapons, with the Light property, that deal 1d4 blunt damage each. You are proficient with them.
• (Sinergy, requires Shield Master Feat) If you aren’t incapacitated, you can add both of your shields' AC bonuses to any Dexterity saving throw you make against a spell or other harmful effect.