Board Thread:Questions and Answers/@comment-24965192-20180824060103/@comment-27971189-20180824140328

Not sure how the answer will reach the original OP though; LOL.

First things first, to make it clear, so there is no misunderstanding. TM already set an 'ironclad' rule that each spin-offs summoning system and HGW are different. So F/Z & FSN rules =/= Extra rules =/= Apocrypha rules =/= FGO rules =/= Prisma Illya rules; all complaints about inconsistensies goes here; you won't find the light if you think all spin-offs have same rules as OG F/Z and FSN.

So far, the only identical summoning system and HGW to OG works is Apocrypha as the writer tried to make it not straying far from OG works.

To begin with, HGW is originally intended to culminate high magical power. So the game (HGW) devs. (Einzberns, Animusphere, etc.) need to make sure those summoned under the system have necessary knowledge to do and recognized the situation as battle royale among several people.

Imagine if Saber just summoned plainly. Speaking on archaic English, no motivation because she didn't know if its a war to begin with. You want to do a war under such circumstances?

Here goes the difference with FGO summoning system.

In FGO summoning system, there's no actual pressure about "You have to win! Get the Grail!" as it more to summon the 'heroes' to save the world. So the knowledge about Grail, is truly to each of their own. This difference is visible on characters like Gilgamesh.

On FZ, the way he see it "I have to fight for something I do not need?" thus expressing how he's bored at most times. Here in FGO he saw it as a cup for wine, no talking about how the Grail is so unnecessary for him anymore.

So if they ever treated it as something cheap, or simply not knowing it, that's pretty much return to each of their own. Some of them didn't know about it, some of them want it, some of them misunderstand it, some of them not needed it--even to the point where they don't give a damn about the cup capable of wish-granting. LOL.