Unstable Mana Crystals

A group of Wretched recently raided a supply of unstable mana crystals from one of our arcane sanctums. If not handled properly, the crystals could explode with enough force to blow a hole into the city walls. Now, <name>, I don't quite care if they blow themselves up while tapping unstable arcane sources, but the whole incident would make my men look bad. Bring me back any remaining stolen crystals you find; they might still be inside their original crates.