How do you beat dead mans volley on Zelda phantom hourglass?

Answer 1

Slash at the energy ball the Cubus Sisters send down to send it back up at them. As the fight goes on, they'll pass it around, the attacks will get faster, they'll shoot lasers, and eventually, they'll shoot three energy attacks. Two will look like clusters of energy, and one will be the ball you need to slash back at them. If you hit the energy clusters, they'll send energy out in a few directions. All in all, though, it's much easier than it sounds.