Your last chance to hear some of the better music in this game.
With the DOminion announcement, I have to say aside from the mode itself, I will miss the game music. I love the rising intensity as the game nears its conclusion- it's also very strong for a dynamic music track (dynamic music is really hard to execute well). The music in SR is too calm and boring.
Also: If you want to hear music rarely heard in the game, queue up for Draft Mode dominion. THe announcement has caused this queue to go from wait hours without a game to 5-10 mins. The champ select music for dominion draft is not heard anywhere else in the game. It's not anything too remarkable, just rare, but It deserves a mention.