[quote=ACHTUNG]
Simple... Yukari...And for the Nasuverse char... Zelretch
[/quote]

Yukari isn't a good enough explanation, especially since trying to remove Kaguya from the universe would cause way too much trouble with Eirin.

And Zelretch has no reason to mess with Saber (also, he's still a generally good person, stranding people in another dimension is going too far).