Yeah the other reasons why King Magnifico is a villain are valid but to me the biggest reason why magnifico is the villain is because he actually has a book of nothing but evil magic, and yes its "forbidden" but not to magnifico he can use it when ever he feels like, no one was forcing magnifico to have that book but him, he chose to have and use it knowing it can only do evil and nothing but evil, if you allow a demon to possess you to do evil things then you are evil.
You bring up an important point about Magnifico’s villainy that often gets overlooked—his deliberate choice to keep and use the book of evil magic. It’s not just the fact that he possesses the book, but the deeper implication that he actively chooses to engage with something that is forbidden and inherently dangerous. The book is full of dark spells and curses, things that can cause nothing but harm. While it may be “forbidden” in the general sense, that restriction clearly doesn’t apply to him, and that’s where the true danger lies.
What’s particularly telling is that no one forces him to keep this book. He could have easily destroyed it or locked it away where it would never see the light of day, but instead, he chose to keep it close, ready to use whenever he sees fit. That’s not a decision someone makes lightly, and it speaks volumes about his character. This isn’t a case of someone being tempted by dark forces beyond their control. Magnifico has full agency in this situation, and he’s making a conscious decision to keep evil at his fingertips. That alone makes him dangerous, because he’s shown he’s willing to use those powers when it benefits him.
The idea of him having a tool for nothing but evil is what cements his role as a villain. It’s like willingly letting a demon into your life, knowing it will lead to destruction and harm, but embracing that for your own selfish reasons. Magnifico isn’t a victim of dark magic—he’s an active participant. That level of awareness and control over his actions is what separates him from a mere antagonist to a full-blown villain. He knows the consequences of his actions, understands the power he wields, and still chooses to indulge in it. And like you said, that conscious decision is key. If you invite evil in and allow it to take root in your life, that makes you responsible for the havoc it wreaks.
In this way, Magnifico becomes a very intentional kind of villain. He doesn’t stumble into darkness; he walks right into it, eyes wide open. And that is perhaps the most frightening aspect of his character. His ability to choose differently, but his consistent decision to embrace evil, makes him all the more dangerous. It’s not just about having a forbidden book—it's the knowledge that he could do otherwise and still doesn’t. That’s what makes him the true villain in the story.
