Looking up Wikipedia, we can know that The Words of the Sea was produced by Alger, entrusted by Klein, looking for a craftsman with the extraordinary characteristics of a marine singer, and then sold to Leonard.
The words of the sea, to gain the ability of sailors to walk in high sequence, can also fly with a staff, but this staff will play tricks on its owner, try to trip or hit its holder, and sing, making the effect unpredictable. In addition, it is easy to be struck by lightning in thunderstorm weather.