User blog comment:Valeth/Ruler of Alexandria/@comment-32751919-20190722010658

So, he is a "Super Boss" of the series right? After you beat Norns, if you manage to make all requirement, he will appear to challenge Chaldea, and after that, you will get another ending instead.

And so, "my boss"? Is that some kind of the sequel hook or something? It look like someone that far more worse than Lancer still out there, maybe Alien God or something else.

PS. I wonder if he can become Ultimate Lifeform like Kars