Aftersound

Max 24 stacks.
When Phrolova is not on the field, casting Enhanced Attack - Hecate: Strings, Enhanced Attack - Hecate: Winds, and Enhanced Attack - Hecate: Cadenza grants 1 {Cus:Sap,S=stack P=stacks SapTag=1} of Aftersound.
When Phrolova is out of combat, all stacks of Aftersound are removed every 30s.