This is not really a weapon, but more of a transportation item. We all know how annoying it is to travel through water, or even along the surface to reach someplace.

I suggest a device that pulls Link through the water at high speeds, kinda like the zora mask. This could be an upgraded version of the zora armor, but it will get rid of that annoying factor in almost every zelda game.

__________________
"When the day is about to be overcome,
And the night is about to cover across the land.
I, the Twilight, shall rise in that fateful hour,
And decide the victor with my almighty hand."

~twilightinthedark~