In League of Legends Season 3, ranked matches will feature a new league system allowing all players that are level 30 and have access to 16 champions to compete, Riot Games
announced. Riot will introduce six different tiers/levels of competition with several leagues in each tier. Players can progress within the tiers through 5 divisions until they qualify for the next tier up. Finally, players can reach the highest and division-less "Challenger" tier. Click here
for more details.