Szeth found purpose in wielding the sword.

It screamed at him to destroy evil, even if evil was obviously a concept that the sword itself could not understand. Its vision was occluded, like Szeth’s own. A metaphor.

How was a twisted soul like his to decide who should die? Impossible. And so he put his trust in someone else, someone whose light peeked through the shadow.

Dalinar Kholin. Knight Radiant. He would know.

This choice was not perfect. But … Stones Unhallowed … it was the best he could manage. It brought him some small measure of peace as he swept through the enemy army.

The sword screamed at him. DESTROY!

Anyone he so much as nicked popped into black smoke. Szeth laid waste to the red-eyed soldiers, who kept coming, showing no fear. Screaming, as if they thirsted for death.

It was a drink that Szeth was all too good at serving.