You get a really good skin in a chest
But it's for a champion you don't like. Now I'm not really complaining since I personally love the rng components and love that Riot is giving me a way to get skins in this game without really having to buy them but man I felt some pain as I decided to reroll Dunkmaster Darius since I don't really enjoy Darius but I got a friend who loves him, and I felt a bit of a jerk doing that, again not complaining just telling an experience of mine