actually you can make this with the brush tool :\
you just choose the spike object thingy with a value of something like 20 depending on your needs for details
once you get your spike you hit ctrl+h and input -32. that'd pretty much make the basic shape if you remove the large circle end of it. after you can open the tip with the clipping tool and add a nice cylinder at the end of it. pretty much the simplest way I can think of by now...
be sure to put this func_detail tho, or vvis will totally freak out