Mightier than the Sword

Mightier than the Sword is an achievement/trophy in Dishonored: Death of the Outsider.

How to Acquire
To unlock this achievement, Billie Lurk has to kill an enemy with a Voltaic Shot loaded with a fountain pen. To do so, the upgrade Makeshift Bolt for the Voltaic Gun, which allows to make bolts out of mundane objects, has to be purchased from a black market shop. Fountain pens can be found through various missions, usually on desks.

Since a single shot may not be enough to kill, even to the head, buying the upgrade Charged Shot and charging the shot will ensure a sure kill. Перо сильнее меча