But if the killer's motive was to show Battler magic, then wouldn't that automatically make the ones preparing the magic elements connected to the killer's plan? The killer not actually planning to make it magical would only be reasonable if Battler's sin isn't about magic at all. Because after all, people really
die because of Battler's sin, so it must be the
killer's motive. It was aid the sin wasn't between Battler and Beatrice, so there might actually be the chance the killer isn't related to magic at all, Beatrice being part of this "magic faction". But it should be Beatrice setting the ending explosion though, otherwise it wouldn't be "Beatrice" killing Battler in the end of EP4. Unless it is really some other method there, which I can't think of. Except "severe alcohol poisoning" (see Image Thread)