I see. So *any* organ will regrow as long as some amount of its tissue remains, but no regeneration to the extent some lizards and amphibians (and plenty of non-vertebrates) have it. And demonstrate the effect of impaling a vampire on a wooden object? That's something ... visually apparent, then, I figure. (And my brain helpfully offers a few random options as to what could happen. My brain also helpfully suggested trying to build a vampire out of the pieces of several...)
 - Were there even any usable wooden objects in the church itself? I kind of imagined the interior being mostly stone and pillars, an if wooden objects had ever existed in there, then those to have been long rotten enough to be easily crushed to dust in hand. Someone would have had to run out to acquire a suitably pointed piece of a branch... blades and sunlight were more readily available.

Climbing on buildings more relies on various ledges, windowsills, indentations in the walls and such, not anything, well, sharp enough to act as a blade or pointed enough to impale fabric on it. I doubt that Zerulic buildings are commonly adorned with hooked protrusions of some sort, perhaps the occasional lifting mechanism (for stuff, not people) excluded? 

...Now when I think of it, Rodorian architecture hasn't been talked about much (speaking mostly in terms of the RP), the occasional description of plot-relevant building left out. 

((I'll post once I'm home, I think. Will be a handful of hours till then.))