Board Thread:News and Announcements/@comment-117.214.88.178-20171201060456/@comment-25669516-20171213103841

You mean the spinning attack right? (the player levitates in air and spins the Guandao).

It is the shadow ability called 'twirl' which comes with the Emerald Claw, a legendary Guandao. Afaik it is the only Guandao currently to have this shadow ability.