One of these days he's going to figure out to stop messing with spell circles. ;)
Interestingly enough, I never taur-ed Virmir in my Metamor Keep stories, though they are quite canon in the setting and actually where I first heard of and became interested in them. If it ever happened, it would very likely be a side effect of a spell go awry such as this. He's pretty used to this sort of thing by now. ;)
If you never read about "MK Virmir", i.e. the "grumpy one", his complete story cycle is here: http://virmir.com/metamor.php It's old stuff that I'm not exactly proud of, but it was still fun. ;)