Death By Embracing is one of Black Lotus' special moves. It requires her whole special guage to be full in order to utilize it.
Black Lotus places her arms (Blades) around her victims neck which gives it the impression that she is hugging them by embracing. With the victim having their guard down, she then uses her arms to effectively behead the victim.
She has used this ability to end the life of the first Red King, Red Rider. In Volume 3, Black Lotus also used this against Silver Crow in a duel.