The 2018 EU League Championship Series is the fifth season of Europe's professional League of Legends league. The tournament will start with the EU LCS spring promotion tournament which is composed of four teams, out of which is 2 lowest ranked team from the LCS summer season and winners from the EUCS Summer playoffs. The 2 winners of from the EU LCS Spring Promotion will be seeded to the EU LCS Spring Season Tournament.
The winner of the spring split will be invited to the 2018 Mid Season Invitational that will be held inbetween the Spring and Summer split of 2018.
As per this season there has been changes to both Promotion/Relegation and Format. The regular season format will follow the changes made in the NA LCS with going back to best-of-ones.
As for the EU LCS promotion, Riot Games have decided to remove the Promotions/Relegation after the Spring season, giving the teams participating more time to cultivate talent
The bottom two teams of the 2017 EU LCS Summer Split and the top two of the 2017 EU Challengers Summer face off in a double elimination bracket with all matches being best-of-fives.
The top two teams making it out will be playing in the regular season of 2018 Spring.
The format of the 2018 Spring regular season has been changed back to that of the 2016 season, meaning that the 10 teams participating in the regular season will all be playing in a double round robin best-of-one format.
The top 6 will move on to the summer playoffs.
Single Elimination bracket with best-of-five matches.
The top two teams from the regular season will be seeded into the semi finals.
The teams placing between 3rd and 6th will be seeded into the quarter finals, and the winners of the quarter finals will be re-seeded into the semi finals based on their placings in the regular season.