He could not feel regret, only a lingering sense of guilt. After all, the Blood Sacrifice Map had backlashed against him, and even he had been utterly helpless against it. Surviving that ordeal had been entirely thanks to the Great Chaos swallowing art he practiced and the Devouring Blood Wheel he had condensed.
"Boss, if I may speak frankly, that Blood Sacrifice Map of yours is truly terrifying. Even you couldn't suppress it. Why don't you just throw it away, just in case it backfires on you again someday?"
At this point, Fat Chubby stopped, but his meaning was already abundantly clear.
Chapter 376