He shakes his head. "No, it's not here--I'd sense it if it were. The years I've spent hunting such things have given me a... knack for sensing them."

"As to what it does, it physically and mentally mutates a great many of those who come into contact with it. Their colour goes ashen and their eyes glow unnaturally. They become more and more prone to violent outbursts. Eventually, they forget everyone they know and even their own selves. They develop glowing lines on the skin. When they've reached this state, they lose all rationality and attack anyone who crosses their path." He sighs. "Eventually they become something unrecognisable as human in both mind and body."