I have some questions about the Servant summoning and catalyst.
How much of a catalyst you need to summon a Servant? for example Waver have a part of the mantle of Iskander, but can he actually, we say, cut the mantle in two, so you could have two catalyst?
The object used as a catalyst for summoning is something that ACTUALLY was in posesion of the hero in question or can be something that only has to be with it or their legend. For example I remember that Flat used a prize Jack the Ripper knife to summon an aspect of Jack the Ripper, but for starters Jack is a special existance so I was wondering if, we say, you want to summon Ardensen, it would be enough with buy a book of The Snow Queen in a bookstore or you would need a original manuscript?
Or is this something that only a unregular magi like Flat can do? he could summon Saber Lilly using a DVD of Disney The Sword in the Stone? I suppose not
Oh, but if is only something that have relation with the Servant you want to summon is possible for a normal magi, for example if Sisigou will use Add as a catalyst without aim for a specific one he would summon Mordred for being someone related to the calalyst?