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Ultimate Skins

"If you overcome the odds and get every single pick correct, you’ll be rewarded with a set of five Ultimate skins: Elementalist Lux, Pulsefire Ezreal, Spirit Guard Udyr, DJ Sona, and Gun Goddess Miss Fortune."[1]

References

  1. https://euw.leagueoflegends.com/en/news/game-updates/special-event/worlds-pickem-coming