Kazsule made his first impression by swiping the "Sword of Truth" card that Gon and Killua had just managed to win—a pretty bold move that caught their attention. Killua figured out pretty quickly that Kazsule and his crew weren't your typical thugs; they were skilled players who didn't need to resort to violence because they had the game knowledge and strength to compete legitimately.
Later, he reached out to Gon, Killua, and Bisuke with a proposal: team up with a bunch of other players to secure the Tsubo of Coast card. The goal was to stop Gensuru from pulling off whatever he had planned. It was a strategic play—getting numbers on their side to block out a mutual threat.
Content compiled by AnimeList.moe from publicly available sources.
