At the last moment, before he died, Sebastian had only one regret.
"I couldn't even dissect a dragon…"
…
What comes after death?
This was an age-old question that has been asked and answered by a lot of races, dignitaries, and authority figures over the years. Everyone had his/her own answer, but there was no definite proof to verify any of them.
Even as an anatomist who dabbled in the physical aspect of sea creatures in his previous life, Sebastian was never able to graduate to the more ethereal aspects of any life that he ever dissected.
This was one of the numerous mysteries of life.
Like was unsearchable to the end, this was why it was called life.
He may shamelessly call himself an anatomy genius, but even if he had a million times more guts, he could never call himself a master of life.