What is the stalk of Lei Jun's sword?

Lei Jun's sword drawing refers to the skill of Lei Jun, the ex-wife of Shendao (General Thunder and Lightning), an thoughtless knife, named after being drawn from his chest. Mihayou reproduces the classic setting of the crown of sin in his own form: pulling out the Excalibur from the position of his chest. Although Genshin Impact and Crown of Sin are not the same type of works, different characters in the same scene show similar effects.