The Strutho thought a moment. "Banefire reacts explosively with many metals. To top it off, it rapidly corrodes metals that don't explode on contact with it. Only glass, ceramic, Adamantine and Electrum are capable of holding it. Darksteel and 'eka-Adamantine' resist its corrosive effects and do not explode on contact but they are not immune to it. Give it enough time and it will eat through containers made of those two metals," he said.
"How do you know about banefire and its effects on metals?" the Human assistant asked the Strutho.
The Strutho chuckled. "Metals and their properties are a specialty of mine. Many Struthos, myself included, are skilled metallurgists," he said.
Torvin grinned. "So if we transfer some banefire into a Darksteel container, seal that container shut, place it inside another container containing steel shavings, we essentially have a bomb!" he said. "Now the only problem is sealing that inside the tube," he added.