I've vaguely heard of a Ruler. But there were none in the Grail Wars that I know of.

[He's not super in the know of obscure fate/ lore.]

You were burnt at the stake, Saint. That's one thing that could harm you. [A beat. Is it blasphemous to point something out that in front of a magical being that is the presentation of a holy saint? Maybe?] Anyways, this isn't exactly a Grail War, and the rules here aren't ones we know. Keeping some stuff close to your chest is totally valid, you know.