Fact one: The weirdly textured mana behaves in a fashion that one can only call three-dimensional. It takes a shape, as it bounces through the grotesque messy pattern, and keeps that shape, and doesn't twist off into complicated dynamics with lots of hidden state requiring mathematical analysis to predict.
Fact two: The pattern seems to want to - correct itself? The blade-pattern presses impressions into the magic, and those impressions develop into deeper divots and form more precise curves, for no reason evident in the kinds of laws of magic this affinity-mana seems to be obeying.
The structure of mana that fires, once it's been built up, still looks a bit sloppy and wobbly; but it makes way more sense than the magic item's pattern, and is definitely more coherent and less sloppy than the patterns of the affinity materials. There's features it developed that seem entirely inexplicable in terms of the much cruder structure that built it.
