I HAVE FIGURED SOMETHING OUT!!!!!!!! I DONT KNOW IF ANYONE ELSE JAS MENTIONED IT YET BUT IMMA STILL SAY IT CAUSE A BITCH LOVES TO PUT OUT HER THEORIES.... LEMME JUST...
REMEMBER WHEN LUCAS SPOTTED TEACHING THE ROYAL FAMILY CAUSE THEY BROUGHT HIM A MAGICLESS KING THAT HE CALLED TRASH BUT THAT TRASH WAS LATER CONSIDERED ONE OF THE BEST KINGS... I LIKE SOME THOUGHT OH WELL DUH THERES ALWAYS SWORDSMENSHIP BUT THE STORY NEVER MADE ANY MENTION OF HIM USING ANYTHING OTHER THAN MAGIC AND IT EXPLAINS Y THE MAGIC IS BLOODLONE GOT KINDA THIN.... ANYWAY I THINK THAT TRASH KING CHOSE BLACK MAGIC AND NOW HES IN THE EXEMPEROR'S(THE OLDER BROTHER'S) HEAD CAUSE FOR SO REASON HE HAS HIS MEMORIES
(for those who feel even a theory is a spoiler) but yea idk but it makes some sense... only one way to find out if I'm right!!!