I never expected this move to actually work.
On the way home, Duanmu Huai pondered the battle. To be honest, the reason he had not killed Athena immediately was to verify his guess. After coming to this world, Duanmu Huai had discovered a loophole in it.
He could not use Soul Cards to summon anyone and could only call people through the summoning list, but there was one exception—he was still a Master in the Holy Grail War and possessed partial authority over the Hall of Heroes. Since this world also had a similar mythology, a question arose.
Could Duanmu Huai summon Heroic Spirits through this method?
Of course, this was not easy. After all, summoning a Heroic Spirit had to follow the basic rules, and the necessary catalyst was indispensable.
Unfortunately, there was no way Duanmu Huai could have brought Medea's or Ellie's catalyst with him—Medea's might be possible, but did Ellie even have a catalyst?
The divine artifact brought by Shito Irina had provided Duanmu Huai with an excellent test subject.
It contained Athena's divine power and perfectly matched the myth of the Gorgon Sisters, making it more than qualified as a catalyst for summoning Heroic Spirits. As a Master, Duanmu Huai also possessed authority over the Hall of Heroes. More importantly, this thing had not appeared in the system, so—it was not like a Soul Card, a part of what had been sealed by the system.
That way, Duanmu Huai could bypass the system's restrictions and summon Heroic Spirits.
Now, it seemed his prediction had come true.
But to be honest, Duanmu Huai could not be sure whether this was actually a bug. After all, he was unlikely to waste his pawns on Heroic Spirits. Heroic Spirits were basically spiritual bodies, and they could be strengthened through