- Chinese: 封龍卡
- Pronunciation: Feng Long Ka
A mini disk, in the form of a guitar thumb pick that stores everything about power-users. If it were to fall into the wrong hands, it can be used to wipe out those with special powers. it said to to record the Yi Neng Xing Zhe world secret and distribution map of the Ultimate Iron Man
Members of the Xia Lan Xing De family (夏蘭荇德家族) have been its keeper for centuries and are responsible of guarding it with their lives. The guardianship has always been passed down to the eldest son or daughter. However, its current keeper is Xia Tian, the second son, because Xia Yu, the eldest son, is a muggle.
Later, it becomes Xia Tian's guitar pick to play the legendary guitar "Iron Limitless" (鐵克無極).
While its true powers are still veiled, it can be assumed that it has the power to resurrect people if used properly.