Forum talk:Neekerivittu/@comment-186.222.247.138-20121107155738/@comment-5713788-20121107205335

They both hit at the same time, the shadows' shadow slash damage is equal to Zeds' slash hitting only 1 time, so the damage is calculated from the Zeds info spell. The result from combining them is more skill range + more slow.

Also, it reduces the cooldown of Living Shadow by 1 sec per enemy hit. (read it)