Does then means Joyboy stored his haki in Nika DF?
No wonder Luffy is powerful.
They tried to tell us Oden's haki was in emna but Oden didn't have that power and his haki was never stored in it. Kaido called the haki in enma strange. He knows Oden's haki so it wouldn't be strange to him, but he doesn't know Zoro's haki.
This all but confirms black blades are created by permanently adding CoC and CoA haki to the sword.