New Game Type Idea

I was thinking about maybe having a game type geared toward new players that allow you like 3 games with a champ that you havent played before. I know the champion rotation is a thing, but sometimes it takes FOREVER to get the champ you want to try out in the line. This way, you can see if you like the champ and want to wait to play it in the rotation or if you love it enough to outright buy it. Once you play 3 games with a champ in this game type or at all in another game type, it would lock your account off that champ on this game type so you couldnt just keep playing the champ for free all the time. Once again, it would be primarily be geared toward new players or players who are simply wanting to test out a new role or champ.