Kuma's Paw-Paw Fruit might be the key to Devilfruit weapons like Funkfreed or Lassoo. We know for a fact that Vegapun found out how to feed DF's to objects. The Pawfruit allows one to make things like pain tangible. Maybe he can push out the essence of a Devilfruit and put a weapon into the bubble or something. Blackbeard already has an authority chip from Captain Coby.