Publisher's blurb: Ruthless assassins who have acquired great knowledge regarding the biology of all creatures, they are able to strike at foes with ruthless, bloody attacks that leave them bleeding, in uncontrollable pain. Dreg letters are veritable torture masters who love the sight, smell and texture of blood. They enjoy drawing it from creatures, and by doing so can learn about the qualities of their victims rapidly. Death follows them and they welcome it with open arms.