The Abomination (Mona Lisa's Revenge)

The Abomination was a creation and masterpiece of Giuseppe di Cattivo painted using pigments derived from sentient rock that fell to Earth. The Abomination sent di Cattivo insane and he crafted the Chinese Puzzle Lock to make sure no one ever saw it. It was soon located underneath the International Gallery and recovered by his sister, Mona Lisa, but he was shot and killed when K-9 destroyed the painting's pigments, and subsequently, the living Abomination. He took on the form of a huge Demon. (SJA: Mona Lisa's Revenge)