The Strongest Assassin: Start with the Peashooter Box

I, Dongfang Qi, male. In the Qicheng Assassin Ranking, I am the 74741st Assassin, burdened with tens of millions of debts left by my parents, and have become a second-generation assassin. In the three years since I have been in the industry, I have super assassination skills and have failed repeatedly (without success). Until one day, when I was going out, I received a express box from the toilet. Bite! Your express delivery has arrived! [We deliver express delivery everywhere and will send you a free express delivery on time every week, no matter where you are! So Dongfang Qi opened the box: [Pea Shooter: The Strongest Shooter in the Demon World] [Rate of fire: full] [Ultimate move: Demon Cannon (wherever the caliber reaches, demons will be killed!)] [It is the best weapon specially used by assassins to assassinate targets! As for Qicheng, where Dongfang Qi is located - the world in the daytime and the underworld in the dark.