Appraisal
A week had quickly passed after Vincent attended the Black Tower's academy.
During these few days, he attended not only the Arcane Mysteries Class but also the Mundane Magic Class under Professor Ceren.
Since he was blind, he was given special treatment by the Professor. She even allowed him to learn through a Knowledge Base Crystal filled with different but familiar technology brought and shared by the Celestial Beings.
Apparently, the Celestials introduced other sources of energy like electricity and such but it didn't become popular because of the existence of Energy Stone.
The stone originated from a drained Beast Cores. After filling it with a bit of Aura, it would become Energy Stone that Raizen had previously introduced to Vincent.
That became the source of energy or replacement for electricity.