Who knows, free Transfiguration works but seems to conserve mass, broomsticks work, but have effects similar to the standard reactionless drive+inertial dampener (and you can make a “reactionless” drive if you can shake masses about fast enough in curved spacetime paper)
Who knows, free Transfiguration works but seems to conserve mass, broomsticks work, but have effects similar to the standard reactionless drive+inertial dampener (and you can make a “reactionless” drive if you can shake masses about fast enough in curved spacetime paper)