Wise wizards know better than to try dividing by zero. But Cadmus is no wizard. He tried. In fact, he is the oly known entity in the Runiverse who dared to divide by zero and lived to tell the tale.
At least, the important parts of him survived. His body and most of his face disintegrated in the violent outburst of antimatter that followed. Luckily his brain remained unscathed and he was saved quickly enough for the rest of him to be replaced by mechanical parts.
The onyx panther that follows him is a sentient creature actually formed by outburst of antimatter after the zero division incident.
Cadmus doesn't plan to divide by zero again anytime soon, but he is not afraid to threaten his enemies with such prospect. And they are usually smart enough to not push him to it.
Entered by: 0xf976…936b and preserved on chain (see transaction)