Hand of Vengeance

Hand of Vengeance is a companion perk $$

Obtaining
It is acquired by completing Heartache by the Number, Rose of Sharon Cassidy's companion quest the violent way. This is done by killing Alice McLafferty and Gloria Van Graff instead of obtaining evidence against them in order to have the NCR justice system deal with them.

Effects
Rose of Sharon Cassidy's damage with Guns increases by 15% of her base damage.