LoL: All Worlds winners and their exclusive skins - Millenium

Riot Games lets League of Legends Worlds winners choose a champion to receive a custom skin to commemorate their triumph. Here

All League of Legends Worlds winners over the years - Dexerto

The Girl with the Dragon Tattoo (Millennium, #1) by Stieg Larsson

League of Legends World Championship Winners

Ranking all World Championship skins in League of Legends

LEGO partners with Epic Games

LoL Worlds Skins - All Worlds Championship Skins released to date

LoL Worlds Skins - All Worlds Championship Skins released to date

Esports/World Champions, League of Legends Wiki

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Millennium Puzzle