Death By Piercing is one of Black Lotus' special moves. It requires her whole special guage to be full in order to utilize it.
Black Lotus prepares her move by getting into her battle stance and she crosses her two blades into an X-shape which then starts to glow. Her move must make physical contact and it is known to be a one hit kill move.
She first attempted to use it in a duel against Yellow Radio, but was interupted by the appearance of the fifth Chrome Disaster.