After a long discussion, everyone's strategy was temporarily decided.
Gudao listened to their discussion and was secretly alarmed. He asked Mo Li, "Immortal Mo Li, can a Holy Grail War really do without Masters in the traditional sense? Can a third party directly summon Servants to fight, not for the Holy Grail War itself, but simply to attack others at will?"
Mo Li smiled and gave an answer Gudao could not refute. "Yeah, of course it can. And if a Holy Grail War doesn't break the rules, who would even fight in one? It's just that the methods of breaking them may be open or covert."
Take Julian in Prisma Illya, for instance. After finding Miyu, even without participants who could properly take part in the Holy Grail War, hadn't he filled all the vacant slots with puppets?
This showed that fighting a Holy Grail War did not necessarily require Masters in the traditional sense.
What's more, Justicia and Irisviel within the Greater Grail could not really be considered dead. They could revive at any time.
Could they serve as Masters in that state? In fact, they could. Part of the reason was that they could become Masters outside the traditional definition.
On the surface, having become the core of the Greater Grail, they no longer possessed the qualifications or abilities of Masters. But one must not forget what happened in the Dragon Hundred Year War. Even Black Saber, a fictional and illusory Heroic Spirit, could wield the Holy Grail, summon Servants, and become a Master.
So how could souls that were still alive possibly fail to find some unusual way to bypass all kinds of restrictions and become Masters?
For example, Justicia inside the Greater Grail could stop sleeping and get back to work, continuing to serve as the