Icons. I make them sometimes. You may steal them; I don’t mind. Here, have a grid.
Consider these by-nc-sa. You don’t have to comment if you take any, but it would be nice.
Authority, The
DCU
Kryptonian
Marvel
Miscellaneous
Urban Nordica
(Note that the two ‘stamp’ icons were originally created by randomredux. Though the art on the Chainbreaker one is mine.)