Moruvian Mind Skaters

Just think of them in terms of size. They are dust-sized things- actually just priests from Moru with teal tunics and skates on their feet. Not ice-skates, but mind-skates as it were, and when inhaled, or introduced into the body through an open vein or other portal, they travel via the blood right up to the brain, where they skate around and around chanting hymns of Moru. And it is well known what happens to a brain that is carved up by tiny skates- it oozes and bleeds. And this is generally very bad, but it also produces some intense optical effects for the inflicted. So the Moruvian mind skaters are a sort of recreational drug, but they usually cause bad in the end because even though the body will eventually rid them, if one continually uses them for stimulus, they will cause great harm.
How did these priests get to be so small? It is all some sort of magic and not wholly on the up-and-up.
There are regular-sized priests of Moru, sure, but they are not nearly as interesting (or abused).
How can there be so many of them? Some sort of duplication function, when the size goes so small, the matter has to go somewhere, so they multiply over so many times to equal the original mass...one priest makes a heck of a lot of mind skaters.
It is said that H'jima Kooz, the famous avant-garde posterizer, was on mind skaters almost always and that is why he died so young. But really, he died in the uprising of Kane, so who knows, right? It is, however, almost surely why his posters were so intense and incomprehensible.