This case is a supplement to "Joe Mazzulla and the Boston Celtics" (A) and is set against the backdrop of the 2024 NBA Finals. It describes the impact of Mazzulla's decision to rally his team with an aggressive "go for the kill" mindset instead of choosing language that is more aligned with their "joyous intensity" culture. After being up 3-0 and losing Game 4 of the NBA Finals, Mazzulla adapts his leadership approach for Game 5, helping the Celtics secure a historic 18th championship title. The case concludes with post-season reflections, a celebratory victory parade, and a focus on sustaining success and continuous improvement for the season ahead.