Soul Solid

Soul Sword is the weapon Brook uses after the two years of training before remeeting with the other Straw Hats. Its appearance is almost identical to his former sword. In fact, it is nothing but another cane sword with no distinct new features compared to his old sword.

Abilities
If it weren't because the owner of this weapon is Brook, it wouldn't be special. The name of this swords comes from the fact that Brook is able to coat it with his own soul enhancing it's power. With the energy of his soul, this sword can bring the very cold of the underworld and freezing everything it touches, making it a highly powerful weapon in hands of Brook.