Talk:Chaldea Boys Collection 2017/@comment-27904100-20170310080536/@comment-29830134-20170310085432

Well seeing as it is said that the throne of heroes exist beyond time and that inside it exists parallel version of known servant we can infer that rather than having vague memories of parallel worlds, they can be summoned in multiple timeline. (And don't confuse the three route from FSN as parallel timeline, Nasu said that only one happens but that each can happen. Meaning choose your canon -_-").

But well since FGO and his jokes servant I take everything with a grain of salt, or rather I take the full nasuverse with a grain of salt and when a thing not fully explained or rather strange happens there is only one answer :Zelretch did it. (And that is how we have Prisma Illya as a caster)