Master, My Disciple Has Become the Master of the Underground!

[Invincible in the world + the strongest pretentiousness + unparalleled background + decisive killing and cool writing! No procrastination! Three years ago, my family was brutally murdered by my enemies. I was forced to flee to the underground black city and lurk here. Three years later, I returned from the killings as the underground king, and I was bound to poke a hole in the sky!