Immortals was announced on October 7th, 2015 as a new esports franchise and also the new brand of Team 8, with that roster being their first of multiple planned esports teams. Soon after the team's creation, support player Dodo8 became the team's player manager, retiring from competitive play. Immortals ended up with an entirely different roster from the Team 8 players that they started with: on December 8th, they announced Huni, Reignover, Pobelter, WildTurtle, and Adrian as their roster for the 2016 season.
Expected to be a top team in the LCS, Immortals initially exceeded all expectations as they went undefeated for the first six weeks of the season before losing one game to reigning champions Counter Logic Gaming in week 7. They won the rest of their regular season games, but as the season progressed further they looked weaker and weaker as a team, and even seemed to falter against the last-place Team Dignitas, needing to come back against them to pull out a win. With a top seed clinched into the playoffs, Immortals were guaranteed to face the lowest-seed team that won in the quarterfinals. That team ended up being Team Solomid, who were on a strong upswing after a sixth-place regular season finish. With questionable drafts including a Lucian top for Huni in game 1, Urgot mid for Pobelter in game 2, and three games of Karma support for Adrian as well as not a single contest of the strongly-in-meta Ekko, Immortals lost 3-0 to TSM. They came back the next week to beat Team Liquid and finish in third place overall.
Throughout much of the summer Split, Immortals was the second best performing team right behind TSM, though it did briefly rose to claim the number one spot during week 8 when Phoenix1 defeated TSM in a 2:1 fashion. That said, the team was no longer dominant like it was back in spring split. There were in fact a number of games where Immortals were only able to close out a close series because of Huni's mechanical prowess or Pobelter steady shot-calling in the late game. Nonetheless, their 16-2 record in the summer split earn them a bye into the quarterfinals where they face off against Cloud9 whose performance was vastly improving since the second half of the summer split. After 5 long grueling matches, the Immortals lost to Cloud9 in 2:3. Shortly afterwards, they face off against CLG in Vancouver and in 3:1 fashion, they end the summer split in third place. With a combined 120 circuit points, the Immortals were directly seeded into the finals for the 2016 NALCS Regional Playoffs where they hoped to secure the third seed for World. Unfortunately, they lost again to Cloud9 in 1:3.
In the offseason, all the players were given the option to reach out to other teams, even though they were still under contract. At one point, Reignover was loaned out to CLG to become a coach for Xmithie in preparation for the 2016 World. Eventually though Reignover, Adrian, and Wildturtle all left Immortals to join Team Liquid, Phoenix1, and TSM, respectively. Huni was originally set to stay with Immortals and had signed a contract with the organization, but once SKT reached out to him for the top lane position, Immortals CEO Noah Winston decided to let Huni leave on amicable terms. Pobelter was the only player to stay with the organization.
In December of 2016, Immortals announced through Youtube that Flame, Cody Sun, Dardoch, and Olleh will be joining the starting lineup with Pobelter. Throughout the 2017 spring split, the team struggled to develop team synergy and have better communication issues since both Flame and Olleh were not fluent English speakers. Interpersonal relationship within the team was also an issue, particularly with Dardoch who's always had a strong personality. Eventually the team finished 7th with 8-10 record to maintain their spot in the league but missing playoffs. During the offseason, Immortals made a number of adjustments, notably by bringing in Ssong as the new head coach and trading Dardoch for Xmithie from CLG for the summer split.
In their second game of the NA LCS 2016 Spring Split, both set the record for the fastest game to date in NA LCS history and also achieved the second perfect game ever in NA LCS history.