There are two paths for Qi Yuan to ascend in the Blood Robe Tower. If he could promote to black-clothed assassin through his own strength, he wouldn't have needed to waste more than a decade in Changning Prefecture. Therefore, his only hope is to ascend through the second method.
Yet Qi Yuan's actions all these years in Changning Prefecture had been faultless yet devoid of merit. The idea of promoting through merit was virtually impossible.
But the book in Su Xin's hand, could give him enough credit, become the key to make him an official member of the Blood Robe Tower!
Originally, Qi Yuan's Blood Robe Association also strived to collect some poisons produced by the Southern Barbarians, even deliberately training many disciples to learn their language to communicate and buy these poisons.
But even so, Qi Yuan can only collect dozens, or at most, hundreds of kinds of poisons each year.
