|And how about this illustration?|
No one knows why. At least, no one outside of you the GM knows why for your game. Is The Monster a supernatural horror? If so, where did he come from? Does he serve someone stronger/worse? What is his purpose? Or maybe he's a mechanical horror, created by a twisted genius with a flare for the Gothic instead? What if he's actually an alien probe, not from space, but from a dark dimension adjacent to ours (Ravenloft Champions, anyone?). There's a multitude of possibilities, and Classic Enemies provides no correct answer. And that's the way it should be.The GM should always have the last word about how something works in his or her campaign, and The Monster is the horrible, blood-drenched, maniacally cackling poster child of this philosophy.
Go forth, my Monster! Wreak havoc! Kill! KILL! KILL!