Dual Weapon Expert

Your long practice with wielding two weapons has allowed you to learn certain techniques to give you an edge in combat.

• Your speed at attacking your enemies is unmatched. When wielding one light melee weapon in each hand, you can choose to attack with both weapons at the same time. When you take the attack action, as a bonus action you can add your offhand weapon's damage dice and effects to your main weapon's attack. If you land a critical hit, the damage dice of your offhand weapon does not double. Additionally, the total bonus to attack rolls and damage rolls can only stack to a maximum of +3. For example, if a Dragon's Wrath dagger and a Flametongue dagger are dual wielded, their damage is equal to 2d4+your dexterity/strength modifier+2d6 fire+1d6 damage. Wielding two +3 daggers will have damage equal to 2d4+your strength/dexterity modifier+3 damage. On a critical hit, only one of the weapon's damage dice will be doubled.
• You can manipulate your enemies' focus to your advantage. When wielding two melee weapons, one of which has the light property and the other does not, you can use your bonus action to feint an attack. When you do so, you gain advantage on your next attack roll during this turn.
• You have learnt how to parry away the blows of your enemies. While wielding two melee weapons, neither of which have the light property, when you are hit by an attack you can use your reaction to block your enemies' strikes. Till the start of your next turn, you gain a bonus to your AC equal to one roll of your offhand weapon's base damage die, potentially making the triggering attack miss. 

Even if you have a way to wield more than two weapons, only one of these features will be active during a round of combat.