So, I had an awesome dream of a League MMO

I know this topic has come up quite a bit, but last night I had an extremely vivid dream of some friends and I playing a League of Legends MMO. We weren't even really far into the game (I think we were, like, level 10), but I actually was so stunned at how vivid it was, I wrote down the bits and pieces my dream gave me and elaborated on the idea. I'm thinking about shifting this into a DnD game I play with my friends, but thought I'd go to the boards to see if you guys could flush out any more ideas, since this community is insanely creative.

You see, the premise of the game was that it took place before the Institute of War was created and the Rune Wars were still going on. Your character was a rather unknown 'hero' trying to make a name for themselves by taking as much power from the runes as they could. From levels 1-10, your character is factionless, focusing mostly at making a name for themselves until the different factions notice the character at level 10. Then, the PC would choose which faction they wish to join (Noxus or Demacia were the major factions, but there were options to join 'lesser' factions in later levels such as Piltover, Bandle City, etc).

The overarching plot was kind of vague, but I had the idea that there were various 'dark mages' or something similar that were making the magical damage that the Rune Wars were causing even worse, and the end-game content involved raid quests given by the extremely over-powered summoners to stop them. Mostly, however, I believe that the majority of the game's story involved your character trying to win battles and help the forces of whatever faction you picked.

There were different races one could choose as well. I was a human in my dream, but there were five to choose from: Human, Undead, Yordle, Troll, and Ursine). Obviously, depending on what race you picked, it'd be easier to gain influence with the different city states that were associated with your race.

The classes were pretty much just like League: Assassin, Marksman, Bruiser, Mage, and Support.

I don't know why I decided to post this here other than to nerd over some video game dream I had, but I was wondering if anyone else had any cool ideas similar to this.