How is it performed?
I take my sword from my left hip and i begin to run towards a dummy standing in the area. As i get to short range from him, i stop and i perform two horizontal slashes from right to left, leaving some cuts on the dummies chest area, i quickly continue and i perform two more horizontal slashes this time from left to right, cutting the dummy open in the chest are. I end my attack by raising both of my hands while grabbing my katana tight with both of my hands and i drop it, without using any power, slashing through the dummy's head.
Showcase of usage in a combo
Like you said, in the description it doesn't state how many slashes you can perform, so one can take advantage of that and perform countless slashes. By performing several countless slashes, my opponent would busy dodging them, as the speed i perform the slashes is great. So when i chose to perform the last slash, i could probably surprise my opponent by quickly crouching and delivering the final and powerful slash at the enemies feet, cutting them. One can also perform the slashes and channel some raiton-infused chakra into the sword and wind-chakra also, giving the sword more of a cutting power.