The Ultra Rapid Fire future - Available through April 7th.

In case you had any concerns about the legitimacy of the new U.R.F mode, it was indeed this year's April Fools' Day joke! While it's, not the true future of League of Legends. You can still enjoy the featured gameplay mode through until April 7th at 11:59 PDT.

Here's Riot Nakyle with more:

"So Ultra Rapid Fire isn’t the future of League of Legends, but it is pretty good for the lols. 

If you missed it, you can learn more about Ultra Rapid Fire in the video here! Enjoy U.R.F. until 11:59 PDT on April 7th! Also, be sure to check out the VoD of Cloud 9 and TSM going toe-to-toe in U.R.F. 

April Fools,
Rito Games"