Although it's prolly gonna end up being resolved by some friendship or wish-washy-nonsense moment, still... COOL, SOUL'S MAAAD. xD The black sphere freaked me out when I first saw it.
All in all, a good chapter compared to the other chapters before. The Medusa/Chrona focus seems wayy more interesting than Noah. Mind you, he'll prolly reappear sometime later.
Imagine if the "Final Boss" was Chrona, Kishin, Noah and some other big baddies? Considering Medusa, I wouldn't be surprised if she somehow managed to merge everyone together.
O_O
That would be gawd-awful.