There was blood all over the place on the pics, so it was likely the Reaper's doing.
I am more interested to know whether this business with Calli is over and done with or still ongoing, tbh, than I am in Hiyori vs Orochi or Luffy vs Kaido. Easily the most unpredictable plot point introduced alongside Law & Kidd vs Linlin.
Momoron couldn't even catch a cold, mate.