How do you get the Worlds 2012 - Championship Riven?
It was an esports viewing reward. Riot's description in the client reads: “Earned by using a code distributed to viewers of S2 Worlds on site and on stream.”
Is the Worlds 2012 - Championship Riven still available?
No. The Worlds 2012 - Championship Riven was an esports viewing reward: it dropped to viewers who watched LoL Esports broadcasts or completed LoL Esports missions in 2012. Past drops are not handed out again, so it cannot be earned anymore.
