[4] After advancing as the top seed from their group, SSG swept both Cloud9 and H2k-Gaming in the playoffs, earning a spot in the final against SK Telecom T1 (SKT).
[6] After securing third- and fourth-place finishes in the 2017 LCK Spring and Summer splits, respectively, SSG qualified for the 2017 League of Legends World Championship.
[7] In the World Championship group stage, Samsung finished with a 4–2 record, with both losses coming from Royal Never Give Up.
[8] Progressing to the knockouts, they defeated Longzhu Gaming and Team WE in the quarterfinals and semifinals, respectively, SSG advance to the World Championship finals, where they once again faced SK Telecom T1.
[8] Switching to Varus in the third game, a pivotal moment occurred at the 39-minute mark, when Ruler used a move called Flash, propelling himself toward SKT mid laner Lee "Faker" Sang-hyeok, creating a chaotic situation.
However, SKT's players were positioned in a way that created a brief opening, and Ruler took advantage of the opportunity and killed Faker.
Throughout the series, Ruler adeptly managed minion waves, secured kills, and contributed to tower takedowns.
[19] On April 1, 2020, during a match against T1, Ruler achieved a milestone by becoming the 11th player in LCK history to secure 1,000 kills.
[20] Gen.G performed well in the regular season, finishing atop the standings with a 14–4 record and advancing directly to the 2020 LCK Spring Finals.
Ruler's contributions, including playing as Senna in the first match and Ezreal in the second with a quadra-kill late in the game, helped secure victories.
While they lost to T1 in the playoff semifinals, the team had already secured qualification for the 2021 World Championship, marking Ruler's fifth appearance.
He had the highest KDA among all LCK players at 7.6 and tied Liiv Sandbox's Lee "Prince" Chae-hwan for the most kills at 213.
[37] In the World Championship, Gen.G advanced past the group stage and faced DWG KIA in the knockout quarterfinals.
In the final teamfight, Ruler secured a game-winning quadra-kill, pushing Gen.G to the win and advancing them to the semifinals.
[42] In his debut LPL match on January 14, 2023, against Bilibili Gaming, Ruler achieved a pentakill, marking his seventh in his career.
[43] Ruler's performance throughout the regular season earned him a spot on the 2023 Spring LPL First All-Pro Team.
[53] Ruler represented South Korea in the League of Legends demonstration event at the 2018 Asian Games.
[54] Held at the BritAma Arena at Mahaka Square in Jakarta, Indonesia, from August 27 to 29, 2018, the South Korean team secured a silver medal following a 1–3 loss to China in the finals.
[57] Ruler clinched a gold medal as South Korea emerged victorious against Saudi Arabia, China, and Chinese Taipei in the quarterfinals, semifinals, and finals, respectively.
While he excelled on his signature picks, such as Varus, Jhin and Ezreal, traditional AD carry champions, he appeared to struggle when stepping outside of his comfort zone.
In 2018, ESPN highlighted his willingness to learn, citing facing Uzi as key moments in his career.
[60] Over the course of his career, Ruler evolved into a player recognized for his prowess on late-game scaling carry champions, including Aphelios, Jhin, and Jinx.
His playstyle centered around prioritizing farm and reaching the late game, where he emerged as the linchpin of Gen.G's damage output in crucial victories.
Despite being a prime target for opponents, Ruler showcased exceptional ability in handling dives and gained a reputation for turning teamfights in his team's favor, even when at a deficit.
Rather than focusing on winning the lane, he prioritized maximizing farm to carry games in the late stages.
Ruler's strength lay in his capacity to impact teamfights from a distance, providing him an advantage over most ADCs who adopt a more upfront approach.
While occasionally labeled as selfish due to his late-game focus, Ruler's predictable yet effective strategy was a key component of his success.