also the dream eva had is not nessarly exactly what happend plus he could have been doing that just to annoy her
also the gravity magic was definatly nagi's and i would bet that the cards his friend had could have been done with as chamo said open veins and swaping blood-the reason negi doens't is these are girls is well its gross and they are girl kissing is normal for this kind of thing
also nagi was trying to do something big its possible that eh was trying to stop the demons that he fought and that white haired kid looks like one of the people in the picture
Well, what I know from the Chuangyi translations (in Singapore) and from online scans is there are other ways for forming the pactio. I believe it's only the DelRey translation that states bloodpacts as a way. I don't deny the POSSIBILITY that this MAY BE true. The only method MENTIONED was through kissing.