Seraph began his League Legends career as a top lane substitute for NaJin White Shield, though he only played one game with the team in OGN.

When Counter Logic Gaming announced that they were searching globally for a new top laner, Seraph approached MonteCristo at an event and requested a tryout.

TDK used substitute mid laner Alex Ich in their promotional matches and won 3–1, successfully qualifying for the NA LCS Summer Split.

Despite that initial success, Team Dragon Knights were only able to secure two more victories over the next four weeks, and they finished in last place with a 3–15 record, one game behind Enemy.

From September to December 2015, Team Dragon Knights briefly renamed to Team Arena Online; however, they changed their name back due to concerns from Riot about the title sponsor Arena Online fulfilling their promises to the community regarding a million-dollar tournament circuit.