Welp, looks like Blackbeard refused to leave empty handed, and wanted Koby specifically. Hmmm. Chances Blackbeard knows about the existence of Sword? I bet he's going to torture Koby for information (or use Laffitte's hypnosis on him).
I'd imagine the Seraphim are using King's damage-reduction technique, but... maybe modified?
Time for Law and Chopper to dissect King and make some anti-Pacifista-weapons with good ole Franky.