Before Klein could respond, Alice, who had remained behind, stepped forward, her expression filled with suspicion.
"Arthur, what was that? I know it was black powder, but how do you even know how to make it—let alone how to use it like that?" Her voice was sharp, laced with both curiosity and unease.
She crossed her arms, narrowing her eyes. "I've seen parts of the process while you were making it a few days ago, but it was too precise to be accidental. You knew exactly what black powder was before you ever produced it. You knew how to make it, what ingredients you needed, and their exact proportion to make the black powder… You even sent a search team specifically to find sulfur. That's not something a person who just changed could suddenly understand."