*My post has both very early Fate/Zero and Fate/Stay Night spoilers
Is there an actual chant that you are supposed to use, or do Masters just make up their own stuff? I don't get it. The "Fill, Fill, Fill, Fill, Fill, repeat five times. But when each is filled, destroy it" part seems to carry across all summonings, but is that the only required element? Rin says a bunch of stuff to summon Archer, and I noticed her father says the same exact stuff in Fate/Zero. However, were those lines just added by the Tohsaka's? Other than that, there is also the "i swear to be all that is good in the world, and to destroy all that is evil" or whatever, and seeing as Kiritsugu also says this, it is likely part of the official chant.
But then we have people like Shirou who didn't say anything, or Ryunosuke who only did the first "fill" thing. I don't really remember if it is ever stated why Shirou can't provide Saber with mana, but is that the reason why?
Anyways, if anyone could post the actual chant it would be helpful.