A faction that united the Eldar, Dark Eldar, and Harlequins under one, copyrightable banner, the Ynnari didn’t go down too well, but at least we got this cool unit to help smooth things over.
The Harlequin's Kiss is wielded by the Eldar Harlequins ... meaning it can penetrate any armor or shield it faces. The Dark Angels were infamous during the Great Crusade for their grim role.