Well... Thanks for explaining the spell again, certainly got it wrong the first time.
The way you described it now reminds me of a certain IRL joke, I just can't remember the name of it (even in Finnish, duh), but it's pretty much what you described except for the bouncing part.
So I have to agree with hamza and suggest the ability without the spinning, and as far as I know, there could be another way to make it look like "charged", such as making Fradz play some certain animation and giving him a certain buff effect there etc...