Supervillian powers

[Magus]

Mind control is usually the most effective. You can make everybody your slaves or have them kill each other for you. Presumably, no one should be safe, although for the purpose of stories, it seems like something always comes up to defeat them even though it presumably shouldn't (telepathy blocking helmets like Magneto wears, or in the case of technological-based mind control, Batman beats everybody up and turns off the mind control machine. Sorry, Mad Hatter).

Necromancy is always pretty cool, like Master Darque, although sometimes its used for humorous purposes, like the Black Talon (but seriously dressing like a rooster? He's just asking to be mocked).

Technological prowess is always a good choice. Dr. Octopus is one of my favorite villains. Being super rich and technologically advanced is the best, though, which is why Lex Luthor is always wearing badass powersuits.