I was thinking more of a horror movie-esq "blood seeping into the walls around you" sort of thing. But, eh, I can see your point. I haven't thought of a better solution yet, though. Having it not be blood leads to the question of "well, what IS it?" and the splurting.. shooting blood at things seems kinda iffy. Having blood seep out of you and spread could work, but then it would need be limited to touch range..
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In the meantime, I've tweaked Coiling again and finally made Magic Ripping more generally usable (folded the magic detection into it).