League of Legends' first international event of 2021, the Mid-Season Invitational is finally around the corner. The prestigious inter-region event is scheduled to begin on 6 May, at Reykjavík, Iceland.The winners from each of the 12 regional leagues will compete in the MSI for awards, glory, and an additional spot in the League of Legends Worlds. The 12 participating leagues and their respective regions are as follows:LCK - South KoreaLEC - EuropeLCS - North AmericaLPL - ChinaLCL - Commonwealth of Independent StatesLCO - OceaniaVCS - VietnamPCS - PacificCBLOL - BrazilTCL - TurkeyLJL - JapanLLA - Latin AmericaThe updated #MSI2021 Groups after today's finals! pic.twitter.com/KXw8QePtgO— LoL Esports (@lolesports) April 17, 2021According to the new format, Riot has eliminated the play-in stage and split the 12 participating regions into 4 different tiers. This segregation is based on the previous two international tournaments.The new structure of the Mid-Season Invitational will provide all the teams with a better opportunity to showcase themselves on the international stage, especially with an extra slot for the Worlds 2021.G2 Esports to officially remain the defending champions of the League of Legends MSI (Image via Riot Games)The organizers have also confirmed that G2 Esports of LEC will remain the official defending champions of the MSI, as the 2020 season got waived off due to the coronavirus pandemic.League of Legends Mid-Season Invitational 2021 detailsLeague of Legends MSI 2021 Groups (Image via Riot Games)The Mid-Season Invitational 2021 is scheduled to start on 6 May, Thursday and will end on 22 May.MSI 2021: Changed FormatThe League of Legends MSI 2021 will see all 12 regional winners battle for international glory. Riot has brought certain changes to this year's format. To date, developing regions like Oceania, Brazil, and Turkey have played a “Play-In” qualifier stage to progress to the next round, while China, Korea, Europe, and North America are seeded directly into the final stage.But from the 2021 season, all the 12 participating League of Legends teams will play from the same level of the group stage, that is, Stage 1. There are three groups of four teams each and the top two teams from each group advance to Stage 2. The final six teams will play in the playoffs (Stage 3) in a best-of-five knockout bracket and eventually, the winners will be crowned the MSI 2021 Champions.Congratulations to @DWGKIA on winning #LCK Spring and being the first team to qualify for #MSI2021! pic.twitter.com/HMGPU58pPn— LoL Esports (@lolesports) April 10, 2021Congratulations to @PentanetGG on winning @LCO Split 1 and qualifying for #MSI2021! #LCO pic.twitter.com/DgiuJ4NI3g— LoL Esports (@lolesports) April 10, 2021Congratulations to @InFinitye_sport on winning the @LLA Final and qualifying for #MSI2021! #LLA pic.twitter.com/2IspP3o5fG— LoL Esports (@lolesports) April 11, 2021Congratulations to @team_detonation on winning the #LJL Spring Split Finals and qualifying for #MSI2021! pic.twitter.com/RNhi8SGpUO— LoL Esports (@lolesports) April 11, 2021Congratulations to @MADLions_LoLEN on winning the @LEC Spring Final and qualifying for #MSI2021! pic.twitter.com/uOkeoz4RpN— LoL Esports (@lolesports) April 11, 2021Congratulations to @Cloud9 on winning the #LCS Mid-Season Showdown and qualifying for #MSI2021! pic.twitter.com/aGAaouwBhO— LoL Esports (@lolesports) April 12, 2021Congratulations to @IWcats on winning the #TCL Winter Playoffs and qualifying for #MSI2021! pic.twitter.com/jMccbjwh6Q— LoL Esports (@lolesports) April 17, 2021Congratulations to @UnicornsOfLove on winning the #LCL Spring Final and qualifying for #MSI2021! pic.twitter.com/6wzZjxSIYS— LoL Esports (@lolesports) April 17, 2021Congratulations to @PSG_Talon on winning the #PCS Spring Finals and qualifying for #MSI2021! pic.twitter.com/4B8JwMk6xM— LoL Esports (@lolesports) April 18, 2021Congratulations to @RNGRoyal on winning the #LPL Spring Finals and qualifying for #MSI2021! pic.twitter.com/rnTXvcWQU3— LoL Esports (@lolesports) April 18, 2021Congratulations to @GAM_eSportsVN on winning the #VCS Spring Finals and qualifying for #MSI2021! pic.twitter.com/1UxzOpQWub— LoL Esports (@lolesports) April 18, 2021Event detailsLocation: Laugardalshöll Sport Center, Reykjavik, IcelandPrize Pool: TBD1st Stage (Groups)Teams are drawn into three groups based on seedingDouble Round Robin formatMatches will be Best-Of-OneTop two teams from each group advance to the 2nd Stage2nd Stage (Rumble)Double Round Robin formatMatches will be Best-Of-OneThe top four teams advance to the 3rd StageStage 3 (Knockout)Single elimination bracketMatches will be Best-Of-FiveQualified teams and Group DivisionsGroup ARoyal Never Give Up (LPL)GAM Esports (VCS)Unicorns of Love (LCL)Pentanet.GG (LCO)Group BMAD Lions (LEC)PSG Talon (PCS)İstanbul Wildcats (TCL)PaiN Gaming (CBLOL)Group CDWG Kia (LCK)Cloud9 (LCS)DetonatioN FocusMe (LJL)Infinity Esports (LLA)Extra Worlds Spot for the League of Legends MSI winnerThe most attractive aspect of the MSI 2021 is an official Worlds spot confirmation for the league with the highest global power rankings. Riot officially announced:“This year, the MSI champion’s league will receive an additional regional team spot at Worlds. After MSI concludes, the final global power rankings will be calculated. The highest-ranking league will get an additional slot unless that region also won MSI. In that case, the slot would pass down to the second-ranked league.”If the winner of MSI falls in the highest-ranking league, the second-ranking league will be brought into consideration for the additional League of Legends World Championship Spot.