I can see why they annoy you .They often screw everyone else over except the one that cast the spell. This seems to be caused by not having a clear idea whats going to happen when the spells cast. I find it rarely does what i think its going to do, still an amusing spell tho. I just wish it was more clear exactly what obstructs it because some things do i'm just not sure what. (I have only got around to using contamination so far.) I think a better indicator of whats going to happen when it is cast is required to make it usable but that is just my 2 cents i still think it's cool >_<.