For those interested I have some stuff here, but no worries I will explain everything at the table.
Masks is a 2d6 system meaning if you want to take an action/make a move you roll 2d6 and add your modifier. On a 6 and lower you miss, on a 7-9 you make a weak hit and on a 10+ you have a strong hit. Weak hits often are not as powerful as strong hits or have consequences, while during a miss the GM gets to make a move.
Your modifiers come from your stats called labels. They represent how you see yourself and how society sees you. These labels are:
Danger: Do you see yourself as strong and threatening? Does society see you as a potential danger? (The Hulk would have high danger)
Freak: Are you strange unique and powerful but also foreign to society? Are you outside natural understanding? (Batman would have low Freak, while Martian Manhunter would be higher)
Savior: Are you noble and self-sacrificing, good at guarding and protecting? Does society see you as overbearing an moralizing? (Superman would be high there)
Superior: Do you see yourself as the best and smartest in the room with the perfect inventions and plans? Do others see you as arrogant and haughty? (Tony Stark would have high superior, the Hulk would have low (he smashes))
Mundane: Do you see yourself as human and relatable? Do others see you as approachable but also normal and uninteresting? (Robin would have high mundane)
These labels can change during play.
There are no races and classes but rather things called playbooks. They represent your archetype, in a way that means what relation you have to the world and your powers. The powers can be very open and you can decide what you want.
For example let’s take the Avatar from Avatar: The Last Airbender
If you think that your conflict stems from living up to your past selves and the legacy they bring you might play a “Legacy”
If you think that you are powerful but untrained and your powers are uncontrollable then you might want to play as a “Nova”
Or if you think that your conflict comes from having to deal with your own ideas against those of your teachers you might be a “Protégé”
This is just a list of examples.
Generally the tone is like this (Thanks to A_Martian_Potato)
Beacon - drama from being an eager superhero without actual flashy powers
Transformed - Drama from being unable to hide how different you are
Doomed - Drama from having an inevitable force coming for you
Janus - Drama from having to keep your superhero and non-superhero lives separate
Legacy - Drama from having to live up to your families legacy
Protege - Drama from having to balance your mentors expectations with your own goals
Outsider - Drama from being unfamiliar with how the world works
Delinquent - Drama from having a chip on your shoulder with regards to authority
Bull - Drama from being changed and having a relation to your “love” and be better than your “rival”
Nova - Drama from being unable to fully control your power
Reborn – Drama due being a new creation and unfamiliar and outside the world
Scion – Drama from being a child of a villain
Brain – Drama from having being the smartest but having created a “great shame”