Originally Posted by
ObsidianFire
No one knows that because Louisoix for all intents and purposes died at Cartenau. No one actually knew what he really did at Cartenau, except the WoL maybe, and that would be due to Echo shenanigans. There's reasons why what Papalymo does to Shinryu is slightly different then what Louisoix does. He's going of Louisoix's research about it, but not the actually spell.
We see Minfilia calling up the Students of Baldesion several times to ask them to find out information about primals and Ascians and the Rejoining. It's implied (at the time) that the Ise of Val was taken out due to the Students of Baldesion finding out too much information about what the Ascians were really up too and the Ascians didn't want Minfillia and the Scions learning about it. For me a least, that was enough "show, don't tell" of Minfillia collecting information for me to think she does it when we aren't there. It was also enough to convince me that I really didn't want to watch quests' worth of cutscenes of her doing more of it.