Flagellation

Flagellation is the rogue class ability of the Venthyr Covenant. It's available to all rogues who join the Venthyr.

This ability is also temporarily available during the Revendreth portion of the Shadowlands campaign; it's given by the quest The Authority of Revendreth and lasts until you finish the Revendreth storyline.

Trivia

 * During the Shadowlands beta, this ability was called Slaughter.