Our next featured gameplay mode, One for All: Mirror Mode, will be available from May 29th until June 8th! The new mode is an new twist on the One For All archetype and features a 5v5 on the Howling Abyss with each member of each team being the same champion, voted on during champion select!
Here's Buffmeplz withe the full scoop:
"Last time you tangoed with One for All, you could nuke the enemy team with five Final Sparks or chain together a series of Unstoppable Forces. Some teams even achieved immortality with back-to-back-to-back-to-back-to-back Chronoshifts.
Now it’s time for One For All: Mirror Mode! We’ve moved the action to the Howling Abyss and changed the rules so players on both teams clash with the same champ. Soon you’ll really play pinball with Monsoons, dodgeball with Dark Spheres or hide-and-seek with ten times the Noxious Traps.
For this iteration of One For All, champ select is determined by the combined nominations of both teams. A vote tracker shows the nominated champions - if one champ achieves a strict majority, they’re chosen. If not, we base the choice on a weighted random from all the nominated champs, so if four people vote for Amumu, three people pick Blitzcrank and the last three all pick different champs; there’s a 40% chance everyone plays Amumu, a 30% chance everyone plays Blitz and a 10% chance for each of the remaining champs!
After playing your first game, you’ll permanently unlock the One For All icon (it’ll take a few days to hit your account). Additionally, we’ve added a feature to One For All: Mirror Mode that allows you to purchase a Battle Boost for your team during champ select. If you purchase one (150 RP), you’ll temporarily unlock all the chosen champ’s currently available skins for yourself and your allies. Everyone on your team also gets a one game 100 IP boost!
This game mode was inspired by feedback from you guys, so let us know what you think! One For All: Mirror Mode will be live from May 29 through June 8 and we’ll be hanging out on the Community Beta looking for your thoughts and awesome ideas!"
Here's the One for All Icon you can earn by playing a game once the mode is live!