Fantasy, My Breathing Can Become Stronger!

You said you are a young genius who crosses a small realm in one day? Sorry, I upgrade based on my mood. You said that your master is a famous sage in the world? Sorry, Sword King Sword Saint and I are brothers. You said you have unparalleled charm and are proficient in playing chess, calligraphy and painting? Ahem... Well, the tune you just played was just something I hummed at my convenience. You said you are as rich as a local tycoon? Wow, you are still a scumbag in front of my average worth. Are you a master of alchemy and a miraculous doctor? Please, can you please not study the cold medicine prescription I wrote? With the system in hand, I own the world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.