Sigmund. Sigmund Hoffman.

A musician who made his name during King Arthur's reign, he was from the School of Rock and Iron in Asgard and joined the Son of the Oak, a well-known branch in the school of abstinence, at the age of 24. The following year, because of dissidence regarding music theory, he was expelled by the Son of the Oak and disappeared from the public eye since then.

At the age of 30, he came to Avalon and swore allegiance to Arthur. He joined the Royal Musician Division, the cream of the crop of the 13 orchestras. After achieving the Level of Master, he served as the deputy head of the orchestra. With a music theory, which was completely different from that of mainstream musicians at the time and was even considered heretical by some, he established the School of Stone Heart and passed it down.

In other words, he was the founder of the School of Stone Heart. To some extent, he was Ye Qingxuan's forebear.

After all, the technology of Ye Qingxuan's Sub-originator was ob