Well it is a bit strong? But nice and simple. You should only add to it in a simplistic kinda way dont over do it dude SwordMaster is crazy that way HEH. Though perfect for ultimate I guess.
hmm... i know this spell... i think i did it in a similar way in my map some time ago... but who cares! cool spell :> but make the shockwave move much faster 'cause it's much cooler that way ^^