Boss, Give Me Some Fairy Spirit!

The boss, Ma Fufeng, is the first person in all worlds to become a true immortal. He always talks about how powerful he was in the past, and always calls himself "the most powerful immortal in all worlds throughout the ages." With just a raise of his hand, he can crush mountains and seas, destroy heaven and earth. It's a pity that I, Ye Cheng, don't take it seriously, because I have a system. Although this system is quite awkward, it always changes the world into a mess. Most of the time, it hurts the enemy a thousand times and damages oneself eight hundred. But don't be afraid, Ma Fufeng will shoot them to death... Hey, hey, boss, even if we have money, we should save some money, so you can give me some fairy spirit!