Here are a few ideas...
Name: Phase Slash
Description: The hero stops the target and forms a circle around it, once complete, any other units around the target are trapped. The hero moves so fast he creates 4 copies of himself from different parts of the circle. The 4 copies then strike into the middle dealing (x) damage to all units within the circle, and the 4 copies become one again.
Name: Hurricane Speed
Description: [Passive] The hero runs with extra speed, and attacks with extra speed, when moving to a distance of 600 a mini tornado is conjured that fights for you for 30 seconds. Only 5 may be conjured at a time.
Name: Breakneck Drop
Description: The hero dashes in a line lifting all units in his way into the air. He then fires a slash wave once they fall into distance and are knocked back, stunned, and take heavy damage.
Rate em' if you wantto.