My friend at the Wizard's university kept getting banished to the Forbidden Zone for doing horrible experiments to reanimate the bodies of the deceased with dark, evil energies that he could not truly control.  After the fifth escape, he finally listened to me and got about 50 of these.  They are small, so they're easy to store in a freezer and they don't contain enough dark energy in them to tear a hole in the thin fabric that separates our reality from the mystic aether when their tiny frames are shot through with eldritch magic and move not of their own accord but the will of my friend, who forges pacts in blood with long-forgotten dread gods.