Requirements: 14 Dexterity
“Singular in focus, one weapon is all they needed.”
When you land a critical hit with a one handed weapon while your other hand is empty, you add an additional damage die.
When you make an attack at advantage with a one handed weapon while your other hand is empty, if both attack rolls would result in a hit, you add the weapon's attribute bonus damage again.
When you make an attack with a one handed weapon while your other hand is empty, the attack deals 3 additional damage.