- A chemical compound that existed in nature long ago, something very rare but present in certain places. Something that could activate just the right genes... the same ones we tinker with endlessly. LIN28. AMPK... The matrix that controls how our bodies repair themselves. I named it, Batman. I call it Dionesium. A little scientist humor, see? After Dionysus, the Greek god associated with rebirth. Hearts sewn into thighs. Helfern and Strange thought it came from meteors. But I think it's indigenous to our planet. Heh. Doesn't seem like a Batman story anymore, does it? That's because it isn't. It's about them. The carriers. And Gotham. People who encountered the chemical long ago and still walk among us. I've heard stories of a few. There's the savage who was among the oldest men alive. He encountered it in its rawest form. And there's the man like a demon who keeps pools of the chemical in secret pits around the world. A corrupted version, but effective in its own way.
Dionesium, named by its researcher and discoverer Paul Dekker after Dionysus - the Greek god of rebirth, is a naturally occurring liquid metal that has the supernatural ability to revive dead tissue, bringing those who encounter it back to life. Natural, uncorrupted Dionesium is hard to come by, often found mixed with other materials, such as the rock that gave Vandal Savage his powers, Lazarus Pits, which are usually controlled by Ra's al Ghul, or mixed in with the Court of Owls' Electrum alloy.
However, by chance, the Joker accidentally fell into a concentrated pit of Dionesium hidden beneath Gotham after one of his schemes against Batman. The Dionesium not only healed his severed face-skin but affected his blood so much that he gained a limited amount of revival powers that he used in his endgame against Batman. The concentrated pool that Joker fell into was seemingly destroyed following his final confrontation with Batman. However, both the hero and villain still made enough contact with the element to revive them from death, albeit with their memories temporarily gone.
Dionesium was one of the five metals that, when all touched to a single person, could create a portal to the Dark Multiverse. Unknown to Batman, he was cast to be the portal and was purposefully exposed to Dionesium in his fight with the Joker.
Links and References