All of these are free to use, and you can track down the art and edit them however you like, JUST don’t be a douche and use cards you don’t own (unless it’s for a cube perhaps) and please keep artist accreditation (Jeremy Carver). and of course: DON’T SELL THEM!
Because I own 7 commander decks and a solumn for 7 a pop is a little crazy, (though I do own an actual copy of all if these.)