As the title says, what would you do, if you became the evil antagonist in real life? Take your ideas in any aspect, let it be something from a fantasy story like Lord of the Rings and etc.
A thing I would do if I became the dark lord
I would give my prisoned victims an unlimited access to the Internet.
I would mute everyones taste buds or make them super enpowered then after a year make then return to normal so everyone will be dying of flavour or dying of not enough flavour
Hire advisors snd stuff and actually try to be a good ruler of my empire while using psychological warfare tactics against the other kingdoms to make them easier to conquer and after a thousand years, disappear without a trace and see what happens.
I would raise an unbreakable, labyrinthine tower of a thousand floors and act as if my throne room is on its last when it’s on the thousandth secret basement floor.