The character is an expert in wielding two daggers simultaneously, allowing them to perform a Double Attack without the damage penalties on the secondary weapon.
Evolution
Level 3: The character no longer incurs attack roll penalties when using both daggers during a Double Attack.
Level 5: The character can equip a short sword in the main hand (FOR) and a dagger in the off-hand (DEX) while benefiting from Dual Blade Mastery.
Level 7: The Double Attack is simplified: the character makes two attack rolls but only keeps the better result for both attacks.