Dear Ninjas, regarding the issue with Kakuzu's breakthrough:

1. It was planned to open in March; but due to code debugging problems, Super Armor - Deterrent is not able to breakthrough.

2. At present, we are planning to repair and debug the issue. When functionality is working normally, Kakuzu's breakthrough will be officially launched in March as a 4-star breakthrough. Players who have redeemed the Super Armor - Deterrent Breakthrough book don't need to worry as this skills breakthrough will be available soon along with his other skills at 4 stars. We are sorry for the inconvenience, thank you for your understanding!