Dismas: Examine burnt out ore.
You like to sneak these into your guardian's meals when he's feeling particularly ravenous to see if he'll choke. You know, just your personal day-to-day acts of anarchy that are bound to spectacularly backfire on your ass at some point, as such things are wont to do.
It's not exactly advisable to be touching this — or any of the other ores you feed to your lusus — at all, as the TOXICITY these things pack shoots straight through the metaphorical roof. But over the course of time and many a disfigured body part, you've developed a certain tolerance to the stuff.