Because...
Did He forget the most basic principle, that the Magic Monarch in their area of expertise is an nearly invincible existence?
If there is any significant flaw in a Magic Monarch, it might be that their professional rank isn't necessarily high enough. Even if they possess advanced magic theories, spell models, and nearly optimal spell effects, they might still be crushed by others with superior realms.
Moreover, 2A is acutely aware that the research outcome of the "Book of the Dead" is exceedingly extraordinary even under Helois's rule.
The "Book of the Dead" originated from the Necromancy Monarch Rudelson, who was already judged. After Helois obtained the remnants, they performed optimizations on the details but still couldn't reach the terrifying level it has today.
