[quote=@DrowsyPangolin]
Isn't expecting someone to know that the burst movement speed of a Servant outranks the speed of a Phantasmal beast a bit extreme though? It seems like a minute detail, especially when there's no real way to have known the speed with which NAGATO's attack came out. I'm not trying to be argumentative or anything, it just didn't seem obvious to me that the action taken to avoid the attack wasn't a viable way of dodging it.
[/quote]

[quote=@Kost Alter]
Hmmmm... after reading both posts again, I do kinda agree it was an obscure fact (granted, I don't know every little fact about Type Moon, so I'm in no position to question its authenticity). It's doubly weird because it is implied that the only way for Rostam to have dodged the attack would've been to jump off his steed, which is something a proud Rider would almost never do.
[/quote]

It's not that minute. I won't expect someone to be able to quote the scene from Zero where this is most explicitly addressed by memory, but the first two Riders that we ever saw, one of whom has a Phantasmal Beast and the other having Divine Beasts, both have it on their stat sheets that their mounts don't even come close to breaking the sound barrier. If someone's apping a Phantasmal Beast mount, I'd hope they'd familiarize themselves with what they're capable of, and looking at the sheets of similar Servants is something of a given with regards to that. And if someone has something on their sheet that they aren't fully aware of the capabilities of, I'd hope they ask me in advance of what sort of thing their character is capable of. 

There were several ways Rostam could have come out of this alive, a couple of which were addressed in the post (abandoning Rakhsh or simply using the fact that an A rank Noble Phantasm equivalent could be endured if Rakhsh fought against it) and a couple more which will be brought up in All About Grail. In the end, though, the method he selected, in line with the mechanics of the setting, meant that he perished. I agree that as a matter of narrative this death was abrupt and was honestly something I was not expecting to occur, but nonetheless, as the GM I will be carrying out that kind of judgment.

[quote=@Kost Alter]
[@Moonlit Sonata] Also, in regards to the whole "Once 7 Servants have fallen the War will end" thing that Ruler mentioned a while back, so far the body count is:

Lancer Nimrod (killed by NAGATO)
Berserker Muramasa (killed by Dulle Griet)
Rider Rostam (killed by NAGATO)
Assassin Cao Cao (will be killed soon???)
Rider Hugues (was killed off-screen or something???)

So, does that mean we're already more than halfway there, or do only Servants killed by official Grail War participants (aka not NAGATO) count towards the 7 total?
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Who knows? The Grail will certainly activate when seven Servants enter it, and any and all Servants are viable to that end. 

If those Servants listed are in the Grail, though, is something I can't speak to.