The Most Ruthless Person in the Whole Continent

Traveling through time and space again, it turns out that I have a system? Is my irresponsible master still the most ruthless person in the continent? It's a pity that the master never cares about teaching his disciples and can only practice hard on his own. Fortunately, we have a system. As long as we make weapons and complete tasks, we can exchange them for super weapons. I can't write an introduction… This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.