Yoon "Prime" Du-sik joined Maximum impact Gaming Blitz as a jungler on June 3rd, 2013. The team managed to qualify for HOT6iX Champions Summer 2013 but ended up placing third in their group and missing playoffs entirely. The team disbanded in September and Prime went to America to try and qualify for the 2014 NA LCS Spring Season. They made it to the 2014 NA LCS Spring Promotion Tournament but lost in the group stage and the team disbanded shortly afterwards.
Prime joined the KT Rolster Bullets as their new jungler in July of 2014. His first tournament with the team was the 2014 Season Korea Regional Finals where the team was swept in the first round by NaJin White Shield.
Changes to the OGN rules forced the Bullets to combine with their sister team, the KT Rolster Arrows, to create KT Rolster. Prime was added to the roster as a jungle sub for Score but never played a game.