Ginga-Bishoujo said:
This do make sense because he took them before Negi came, to make them behave themselve while he was waiting him.
Even if Negi can summon their pactio card, I don't think Fate will let him give them back to their original user because in his current mindset, Fate think he is stronger than Negi.
And anyway, the thing is that taking their pactio card would give him less trouble, even if they get it back latter and it's free so why not do it? It would be stupid to let them have their pactio card only for themselve trying to find a way out when he was waiting Negi.
And we all knows that Negi will fight alone, Fate having their pactio card is convenient for him as he doesn't have to worry about Nodoka or Natsumi butting in trying to be a hero because this will be a dangerous fight.
Also what would make less sense is Natsumi and Nodoka making a pactio with Fate, as far as I heard you cannot force a pactio
The fights Negi and Fate were partaking in were happening simultaneously, all Fate seemed to want to do is check out what artefact they had. There was basically no time in between the end of Negi's fight and the end of Fate's fight. It still doesn't change the fact that Negi can summon the artefacts, hell he can summon the minstrae at this point due to being close enough. Akamatsu is probably in battle mode though, so the vast abilities of a system he created seem to have been forgotten.
Pactios can be forced. The pactio formed between Negi and Theodora (chapter 239) was a forced pactio. My theory that it might have been a forced pactio was based upon this, plus the fact that Nodoka was blushing for no reason in the panel prior to Fate showing he had the pactio cards.
I still want to know who this is that saved Fate from being killed, he is clearly being lifted up in this frame by someone to let him catch the magic attack: