In this Pirates of the Caribbean world, Davy Jones, the Devil of the Seas, was definitely the most notable representative of the supernatural powers of this world.
Unlike Ammand's black witchcraft, which used voodoo dolls, Davy Jones could perform some truly destructive magic.
These water pressure knives were actually just jets of water ejected using high pressure, and they had a very powerful cutting ability. Roy flew in midair and dodged several water pressure knives shot by Davy Jones. He also responded by firing frozen air bombs at Davy Jones, but they were all blocked by the Kraken.
Roy saw that this was not a solution. Davy Jones seemed to treat the Kraken as his meat shield, and long-range attacks did not have much effect on him.
Thus, Roy looked for a gap, dived toward the Flying Dutchman, and landed on the deck of the ghost ship with a thud.
I don't believe you'll let the Kraken attack your ship!