Masks of Control

in a steampunk city, the smog caused by the heavy machinery used for almost everything has made the air unbreathable. to walk outside, people have to wear special mask to filter the air, this has made the job of the MaskMaker a profitable one. you're the son of one of said Maskmakers. you turned 21 recently and now you're going to take over your father's workshop, but you have a special power. Ever since you were little you were able to imbue the masks you made with a power that lets you control the wearer, so every mask you made was unsellable. now, as you're able to control your power, it's your turn to provide customers with what they need. the question is, how will you use your power?