Nearly a year in the making, League of Legends: Dominion represents the largest and most ambitious update to League of Legends since its launch in October of 2009. In Dominion, summoners do battle on a brand new map, the Crystal Scar, and vie for control over five Capture Points, a style of play never before attempted in the League of Legends universe.
All this makes for a much faster-paced game than Summoner's Rift with champions battling each other straight out of the gate. The average game length has been reduced from around 35 - 40 minutes down to about 20 minutes, so Dominion will also give LoL a boost in the spectating stakes at upcoming progaming evens, too.
As before League of Legends: Dominion is free to play. More details can be found here.