Take Duke Megera from the Hexennacht for example, he was an influential Demon Duke who had lived for more than 1500 years. His fight with the Commander of Envy, went on for 2 days straight with most of his injuries, even the most dire ones healing in a couple of seconds.
From this, one could tell what kind of realm level 700 and above was. However, for a single magic to contain enough might to kill them, it could be said that it was unprecedented in the current era.
What was even more shocking was that the wielder of such a magic was none other than a Demon Earl, a rank that was two stages lower than them.
Simon clenched his hands, feeling a rush of exhilaration course through his body. He knew better than anyone that it was impossible for an Amalgamation magic of two attributes, one of which was even a novice tier to possess that kind of might.