Talk:Satou Pendragon/@comment-4905541-20190317141537/@comment-26411685-20190320030236

The first time he used the Divine Blade, Satou had not yet learnt to infuse his weapon with mana. He also didn't need to, since his opponent was merely a Greater Demon.

In the LN, the fight against the Goldern Boar Demon Lord was the first time Satou put mana into the Divine Blade. In this occasion, not only did the Divine Blade suck a huge amount of MP from Satou, it also tried to attack him with a jet black aura. It was at this point that Satou decided the Divine Blade was clearly dangerous to it's user and he would restrict it's use even when going full out.

As to why any of this is... I guess no one but the author knows.

My guess is that the Divine Blade will become an important plot point later on in Satou's quest for divinity. And if the LN continues to expand on the plot of the WN, I'm going to guess the Divine Blade maybe made out of Outsider material and thus continues to carry malice towards the gods.